Does anyone know anything about supporting WiFi Direct (“ad-hoc”) capabilites using the WiFi module and how hard it would be to implement?
The new Android ICS OS now supports WiFi Direct. There could be some exciting opportunities here… 
GHI will be supporting this in the next few months in the premium library offers
what is it mean"premium library "?
The non-open source libraries.
Ad-hoc networking is supported by XBee Wi-Fi module
The Gadgeteer driver will be available within couple of weeks.