I have the same issue as you (can't connect to all but one router I've tried), but the missing piece of info is whether or not searching for wireless networks on the iliad finds them. If you can see them every time, but then can't connect when you enter the passkey, you have the issue thetechnobear can fix for you, but if 99 times out of 100 you can't even find the network, even when standing within 3 feet of the router, you have the same issue I do (which, incidentally, iRex claim is completely unique to me!).
If you do have my issue, iRex will insist you have to send the iLiad back for repair, yet are unable to tell you what they think might be wrong. They WON'T try any other troubleshooting beforehand.
Last edited by MarkRPenn; 04-16-2008 at 08:20 AM.