I'm using a Rev C1 unit with these settings:
WPS: Disabled
Security Mode: WPA-Personal
WPA Mode: WPA2 Only
Cipher: AES
MAC Filtering: Disabled
802.11 Mode: G only
Wireless Channel: Ch 8
I'm not sure if you did the manual setup or the CD-ROM setup, but try setting WPA2/AES and G or N only (not G & N). Disabling 'WI-FI PROTECTED SETUP (ALSO CALLED WCN 2.0 IN WINDOWS VISTA)' has helped others.