Well this was way easier than my attempts in Ubuntu 9.10. Kernel 2.6.32 comes with drivers for RTL8192SU which apparently work with the RTL8188SU.
We were having an issue using Rdesktop from Linux RDP-ing to Windows Server 2008 SP2 boxes. Each time we would try and use shared path or device, the Windows box would freak-out and drop the share.
On the linux side, rdesktop would report "NOT IMPLEMENTED: IRP Query Volume Information class: 0x7".
I bought a Hiro H50193 Wireless USB Network Adapter, lsusb reports as "ID 0bda:8171 Realtek Semiconductor Corp.".
**UPDATE:** For Ubuntu 10.4, please see here!