I recently got a WRT54GX and have been having problems during periods of high network activity for WIRELESS ONLY. This is what I have done to test this problem, it should be noted that I am using the same file just for kicks, however it doesn't actually matter as any sustained transfer will cause the problem. Connect with my laptop via wireless to my router, download largeish file, within a few seconds I will get disconnected. My roommate, on a wired connection to the same router, will NOT get disconnected. If I connect, using my laptop, to my helpful neighbors unsecuried AP and download the same file, there are no problems. If I connect, using my laptop, to my router with a WIRE and download the same file, there are no problems. My firmware is the latest Linksys firmware for the WRT54GX, I got a clean copy of the firmware and flashed it just to be sure, no change. In all cases my signal strength and quality are at, or near 100% (I did tests sitting right next to the router just to be double-sure). What other kind of tests can I perform to get more useful information, or does anyone have any thoughts on the problem?