I'm having horrible problems. It's spoiling my iPad experience a lot which is a shame because apart from the WiFi issue I love it. I have a Linksys WRT350N router with, as far as I can tell, the latest firmware (although I have a mystery surrounding that right now). I've tried setting a static IP address and using DHCP and both give serious issues. I have 3 other devices on the network working flawlessly.
I don't see any strength problems, I have 3 bars all the time. Out of the box it detected the network immediately, I entered the WPA2 password, and we were off and running. It seemed solid for about the first 30 minutes but then I started having web pages stop loading or an app or ibook download stall. Going to the WiFi settings and selecting "Renew Lease" recovers the connection (which is why I tried to fix the problem by switching to static IP) but it's only a matter of time before it drops and this fix is needed again. I'd say on average the connection drops every 5 to 10 minutes with it sometimes going 20 or 30 minutes without dropping and other times dropping 2 or 3 times within a 5 minute period.
The only saving grace I see on all this is that Apple have at least acknowledged the problem and said that there will be a software update to address it but I wish they'd hurry up. I'm not entirely convinced that their characterisation of the affected as "a very small number of people" is accurate; if it is then I guess I've just been incredibly unlucky.
- Julian