If your thunderbolt works with the Wifi at work then it's more than likely the modem, especially when looking at the posts below. Who is your ISP? Do they have a wireless gateway that they can offer as part of their service? Most ISPs now tend to offer wireless as part of their service. I'm personally fond of just buying my own equipment. Just tell the wife that you're buying the equipment because it will save you $XX per month on equipment rental.
Can't connect Droid to MR814 - NETGEAR Forums
Unable to connect wirelessely to my 802.11b netgear MR814 wifi routerfrom windows xp laptop..