So I spent 3 hours last night trying over and over and over and over to get on the net. I rebooted the modem and rebooted the router and rebooted the computer over a dozen times.
Today I called quicksilver1 at work and he admitted that he fiddled with the modem last night and hit some kind of security button. Apparently he security enabled the modem without getting a password for me. D'oh! I'll be without internet on my computer until he comes home and figures out the password.