I have the same problem. D-link 774 router. Myself (2Wire wireless USB adapter) and 3 housemates (2 deskop, 1 laptop, ethernet cable connected) periodically get disconnected. For me, it happens most often during Warcraft 3, pretty much every game. Our cable is connected to a box (main portal?) with an ethernet cable going to our router. It seems we have the same problem - maybe a port that is closed on our router? Help us!