If anyone could help me with basically the same problem, I'd be really appreciative. I have a macbook and got a DIR-655 in February. The only place to put the router is on a floor above mine. For a long time the connection has been slow (we only get 768kbps) but consistent. Lately however, the signal has been sporadic and often disappears. To my knowledge, no one has put any new machinery or things in their room that would interfere with the signal. If I take my computer up to the floor where the router is, the signal is way better, but there are times if I am on my floor where I can't get service, but my friend can with his ipod touch. So now I'm not sure where the problem really is. Any advice would be greatly appreciated.