A lot of DSL modems actually have routing functionality that interferes with your actual router. They tend to use a PPOE setup, which means you have to tell your modem to not do PPOE and use the settings that it had to tell your router it's a PPOE connection, complete with the login user/pass and external IP address the modem was getting. I know that sounds complex, so maybe just google on that subject with some keywords and you'll likely find the steps for it.
So I bought one of these doohickeys on Friday. 32G non 3G. The iPad itself is what it is, but has anyone else had trouble with iTunes & docking? I had the devil's own trying to get it to talk to iTunes through my desktop.