Just picked up the new ATV2 and I have expereinced a loss of connectivity at times, especially after sleep mode. When this happens, there's no connection to itunes store, youtube, or my itunes computer. After re-entering the WPA key under network settings, it works correctly. I tried doing a manual IP setup (eliminating DHCP) it works better but it did fail once. I've had a similar problem with my iphone 4 under iOS 4.1 (which is the latest OS on ATV2 now). I would have to turn off/on the wifi and it would be fine for a while. Since iOS 4.2.1 its virtually eliminated that issue. There are only a few wifi network in the area, most under 80db of strength so I don't think interference is a problem. Besides, all my other computers never lose their wifi connections. Anyone else having these problems? Apple discussions has a pretty large thread on this.