Since moving to our new house, we have only one internet connection for all of our computers: a wireless card. Our previous wireless card worked through a wireless router that allowed all our computers to share the Internet, but that card never actually worked well (or at all), so it had to be replaced. The router still works for network activity, and we've been able to connect all of our computers to it, but it couldn't use the wireless card with a USB cable like it could with the old card.
Last night, though, we had a great idea (I'm man enough to share credit). I was logged on to the internet with the wireless card, and I knew my computer was sensing the wireless router, so I decided to share the internet connection to see what would happen. It worked! The desktop, once connected to the router, was immediately able to get online. We uploaded the wireless card software to the desktop (our desktop was only recently recovered from the graveyard of a dead power supply and had not "met" this new card) and got it online. Then I shared the connection again and my computer immediately saw it and connected. Mission accomplished!
Now we just need to get my wife's laptop on, which runs Vista (the rest of them run XP). Still, I find it pretty great that we have managed to created a sort of back door on to the World Wide Web for our computers. We just need to show Vista how to unlock it and come out to play!
P.S.: Now if I can only explain why my laptop would believe it is not online (i.e., won't connect to certain websites) but will connect remotely to my office.... just crazy.