Recommend a wifi dongle for access point setup

[mk01]

of course you can set your phone to static, then you skip dhcp server configuration. if you have iphone it's ok as IOS has dhcp/static settings per network. but this is not case with others so one would need be changing this constantly.

btw: did you cross check also firmwares for the dongle between RBMC and XBIAN. It can't be anywhere else as in FW or MODULE or HOSTAPD version.