OK. For anyone who still thinks they may be able to help- this is what just happened:
Finder-hang. If noone can- I'm off to the Apple geeks.
Date/Time: 2013-06-19 17:05:00 +1000
OS Version: 10.8.4 (Build 12E55)
Architecture: x86_64
Report Version: 11
Command: Finder
Path: /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Version: 10.8.3 (10.8.3)
Build Version: 4
Project Name: Finder_FE
Source Version: 808003001000000
Parent: launchd [161]
PID: 177
Event: hang
Duration: 5.11s
Steps: 51 (100ms sampling interval)
Hardware model: MacBookPro8,2
Active cpus: 8
Free pages: 1272356 pages (+292)
Pageins: 4 pages
Pageouts: 0 pages
Process: Finder [177]
Path: /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
Architecture: x86_64
Parent: launchd [161]
UID: 501
Sudden Term: Dirty
Task size: 20375 pages (+3)
CPU Time: 0.001s
Thread 0x5f7 DispatchQueue 1 priority 46
51 start + 1 (libdyld.dylib) [0x7fff8cd637e1]
51 ??? (Finder + 23382) [0x10c6b4b56]
51 NSApplicationMain + 869 (AppKit) [0x7fff88574bd6]
51 -[NSApplication run] + 517 (AppKit) [0x7fff885d01a3]
51 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128 (AppKit) [0x7fff885d8df2]
51 _DPSNextEvent + 1456 (AppKit) [0x7fff885d9836]
51 AEProcessAppleEvent + 100 (HIToolbox) [0x7fff8a12c709]
51 aeProcessAppleEvent + 318 (AE) [0x7fff8b9fad99]
51 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 37 (AE) [0x7fff8b9faed9]
51 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 307 (AE) [0x7fff8b9fb078]
51 ??? (Finder + 100878) [0x10c6c7a0e]
51 ??? (Finder + 101293) [0x10c6c7bad]
51 ??? (Finder + 104441) [0x10c6c87f9]
51 ??? (Finder + 104665) [0x10c6c88d9]
51 ??? (Finder + 1230171) [0x10c7db55b]
51 ??? (Finder + 1230433) [0x10c7db661]
51 ??? (Finder + 904464) [0x10c78bd10]
51 ??? (Finder + 136600) [0x10c6d0598]
51 ??? (Finder + 137572) [0x10c6d0964]
51 ??? (Finder + 346992) [0x10c703b70]
51 ??? (Finder + 454616) [0x10c71dfd8]
51 -[NSWindow makeKeyAndOrderFront:] + 48 (AppKit) [0x7fff886916dc]
51 -[NSWindow orderWindow:relativeTo:] + 159 (AppKit) [0x7fff88698c1f]
51 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 940 (AppKit) [0x7fff88699038]
51 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1377 (AppKit) [0x7fff88699a18]
51 -[NSView displayIfNeeded] + 1830 (AppKit) [0x7fff885dcc93]
51 -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 4675 (AppKit) [0x7fff88612d6d]
51 -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectFor View:topView:] + 314 (AppKit) [0x7fff88617143]
51 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectFor View:topView:] + 817 (AppKit) [0x7fff886176f2]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSBrowser _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 78 (AppKit) [0x7fff884cc89e]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2704 (AppKit) [0x7fff88619ad9]
51 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1656 (AppKit) [0x7fff886196c1]
51 -[NSView _drawRect:clip:] + 4217 (AppKit) [0x7fff8861b064]
51 ??? (Finder + 456910) [0x10c71e8ce]
51 -[NSControl drawRect:] + 400 (AppKit) [0x7fff886277d6]
51 ??? (Finder + 2645877) [0x10c934f75]
51 ??? (Finder + 2645543) [0x10c934e27]
51 ??? (Finder + 591759) [0x10c73f78f]
51 ??? (Finder + 591994) [0x10c73f87a]
51 ??? (Finder + 592583) [0x10c73fac7]
51 ??? (Finder + 592860) [0x10c73fbdc]
51 ??? (Finder + 359072) [0x10c706aa0]
51 PlotIconRefInContext + 379 (HIServices) [0x7fff84a3d177]
51 PlotISImageRefInContext + 1257 (HIServices) [0x7fff84a3d8c1]
51 _ISGetCGImageRefForISImageRef + 599 (HIServices) [0x7fff84a3ba18]
51 _ISGetBestCGImageForIndexedStorageData + 630 (HIServices) [0x7fff84a3c780]
51 _ISEnumerateIconIndexByPresidenceWithBlock + 176 (OSServices) [0x7fff811a99a7]
51 ___ISGetBestCGImageForIndexedStorageData_block_invoke_0 + 52 (HIServices) [0x7fff84a3cb2a]
51 _ISStorageRefDataInfoGetter(void*, int, unsigned char, _ISIconInfo*) + 29 (HIServices) [0x7fff84a3ccbd]
51 _ISGetStorageDataInfo + 62 (OSServices) [0x7fff811a9415]
51 CIconStorageEntry::GetDataInfo(int, unsigned int, _ISStorageDataInfo*) + 50 (OSServices) [0x7fff811a945a]
51 CIconStorageEntry::GetData(int) + 145 (OSServices) [0x7fff811a9d11]
51 CLocalRefToSharedStorageEntry::Load(CIconFamilyLoader*, unsigned int) + 141 (OSServices) [0x7fff811aa27d]
51 CIconStorageEntry::Load(CIconFamilyLoader*, unsigned int) + 608 (OSServices) [0x7fff811aa4fc]
51 CFileLoaderDataController::GetDataPtrInStorage(unsigned long long, unsigned long long, void**) + 166 (OSServices) [0x7fff811aaad2]
51 FSReadFork + 45 (CarbonCore) [0x7fff8bef7dcc]
51 PBReadForkSync + 85 (CarbonCore) [0x7fff8befa6e8]
51 pread + 10 (libsystem_kernel.dylib) [0x7fff8b771faa]
*51 hndl_unix_scall64 + 19 (mach_kernel) [0xffffff80002ce9c3]
*51 unix_syscall64 + 522 (mach_kernel) [0xffffff80005e16aa]
*51 pread_nocancel + 144 (mach_kernel) [0xffffff8000576ad0]
*51 ??? (mach_kernel + 3631422) [0xffffff800057693e]
*51 ??? (mach_kernel + 1080233) [0xffffff8000307ba9]
*51 VNOP_READ + 77 (mach_kernel) [0xffffff8000311bcd]
*51 hfs_vnop_read + 550 (mach_kernel) [0xffffff80004fab36]
*51 cluster_read_ext + 882 (mach_kernel) [0xffffff80002e53d2]
*51 ??? (mach_kernel + 946161) [0xffffff80002e6ff1]
*51 ??? (mach_kernel + 926863) [0xffffff80002e248f]
*51 VNOP_STRATEGY + 46 (mach_kernel) [0xffffff80003138ee]
*51 buf_strategy + 961 (mach_kernel) [0xffffff80002db9a1]
*51 spec_strategy + 613 (mach_kernel) [0xffffff80003207e5]
*51 dkreadwrite(void*, dkrtype_t) + 1265 (IOStorageFamily) [0xffffff7f808a53b3]
*51 IOBlockStorageDriver::prepareRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*) + 284 (IOStorageFamily) [0xffffff7f8089fb42]
*51 IOBlockStorageDriver::executeRequest(unsigned long long, IOMemoryDescriptor*, IOStorageAttributes*, IOStorageCompletion*, IOBlockStorageDriver::Context*) + 172 (IOStorageFamily) [0xffffff7f8089d518]
*51 IOReducedBlockServices::doAsyncReadWrite(IOMemoryDescriptor*, unsigned long long, unsigned long long, IOStorageAttributes*, IOStorageCompletion*) + 194 (IOSCSIReducedBlockCommandsDevice) [0xffffff7f826436ac]
*51 IOCommandGate::runAction(int (*)(OSObject*, void*, void*, void*, void*), void*, void*, void*, void*) + 378 (mach_kernel) [0xffffff800064907a]
*51 IOSCSIProtocolInterface::HandleCheckPowerState(unsigned int) + 22 (IOSCSIArchitectureModelFamily) [0xffffff7f8095986e]