Actually, the connection's not the problem, I'm fairly sure.
The router seems to be running fine - works great with Jake's computer and I was able to log in to Trillian with no trouble, too. But Firefox is giving me fits! Evertime I boot it up, I get a 'Netscape Communicator Quality something something...' I don't even have Netscape installed on my computer. Rrrr...
(browses the firefox help forums...) Looks like this is a common, and recent, thing. I'm downloading the current version of firefox now; hopefully that will fix the problem.
Edit: Horray! It works! I have connection on my Very Own Laptop. :)
Another thrilling hour and a half in Ellen's exciting life.