I'm now getting almost 20Mbps from my cable provider, so over the weekend I upgraded my system from an older Linksys 802.11b router to the WRT300N, including 2 WPC300N notebook adapters. The good news is that moving from my previous setup to the new setup only took a few minutes, and I was seeing speeds of up to 260Mbps on both notebooks with WPA2 (PSK2-Personal) security, although steady state seems to be 108-162Mbps. The bad news is that after a few hours, something happens and my throughput drops to 1Mbps. I have experienced this with both adapters on two different notebooks. After a while, the speed would slowly recover, jumping to 27Mbps, then 54, and finally back to 108+. All through this, my signal strength and S/N ratio remain solid (per the Linksys monitor). I have installed the latest official firmware from Linksys (0.93.3) for the router and the latest drivers for the adapters. I tried using WPA instead of WPA2 (just in case it was a problem with key negotiation or similar) and I have switched channels several times. I have also used netstumbler to make sure that the channel I was using was clear. I tried to call Linksys support but got caught in a wait queue that eventually dropped me after 20+ minutes on hold. Has anyone else had any experience with this router? Anyone with similar problems?