wireless, eh?
depending on the physical setup of your wireless network (obstructions like walls, etc), changing the channel of the access point might also help stop random disconnects. there are some theories that setting the channel too high (ie: ch11) begins to degrade the signal, so keeping it close to ch01 might help--although if there are other access points in your area, you might change it to ch03 or ch05 to prevent interference. it's worked for me in the past when i had an 802.11b router (back when wifi was relatively new), although some people have had mixed results. nowadays with my 802.11b/g card, i rarely toy around with channel settings, but then that could also be because im never more than a few meters away from my ap.