My iPad 2 and iPhone 4 are not been recognised by the new iTunes when plugged...

Syncing with iTunes on a Mac or PC requires:

Mac: OS X v10.6.8 or later

PC: Windows 7; Windows Vista; or Windows XP Home or Professional with Service Pack 2 or later

Download iTunes at www.itunes.com/nz/download

iPad not appearing in iTunes

http://www.apple.com/support/ipad/assistant/itunes/

iOS: Device not recognized in iTunes for Mac OS X

http://support.apple.com/kb/TS1591

iOS: Device not recognized in iTunes for Windows

http://support.apple.com/kb/TS1538

IOS: Syncing with iTunes

http://support.apple.com/kb/HT1386

Apple - Support - iPad - Syncing

http://www.apple.com/support/ipad/syncing/

 Cheers, Tom 😉