I fixed my D-Link problem....returned it to Tiger Direct, bought Belkin's F5D6050 USB Wireless Adapter (doesn't say Mac support on latest box but Belkin Tech says they still do), downloaded from Belkin the 10.2.x driver (10.3.x available too), installed said driver, ran Disk Utility's Permission Repair, futz around with the USB ports until the Belkin app recognized the adapter (common USB plug & pray issue---e.g., same with Palm Serial to USB adapter), then found my wireless network and bingo!
Cost comparison Belkin vs Apple: Cdn$70 vs Cdn$150, more than 50%.
If you want to go with USB wireless, go with Belkin!
BTW after reading a web page with instructions about running a Netgear MA101 Rev B USB Wireless Adapter using a modified Belkin driver (switch USB Vendor and Product IDs) I also bought a refurbed Netgear unit (Cdn$27) and tried it. No luck. Maybe Belkin modified the driver, dunno. In any case I am very happy to give Belkin my $ for something the really works as advertized!
This is the second time Belkin has come through. I bought their SCSI to USB adapter and now use three different SCSI scanners, including a Minolta Scan Speed slide scanner, a SCSI Zip 100, and laCie SCSI HD's, albeit one at a time (hot swappable!).
Bought one of their Bluetooth USB adapters by mistake off their clearance page, and can wait until I get a Bluetooth cellphone...ah more toys!