Easy enough (Score 1)

http://www.wisp-router.com/wri/itemdesc.asp?ic=PS2-17DP&eq=&Tp= These are a web based radio that functions as both an AP and a client. Easily will reach the distance you're looking for and shouldn't have a problem. I've got people doing upwards of a couple miles with Line of Sight and these. Mount them outside each home or in a window facing the other house with the same SSID configured on both sides and it shouldn't be a problem. Hope it helps, Paul