StarDestroyer.Net BBS

Lately I've been having trouble with my wireless. My computer registers an "Excellent" connection to the network, and I'm about a foot away from the router (a D-Link 823VUP) but I can't actually go anywhere on the Internet. I get errors whenever I try to load a page (unless its cached, so I can load up the SD.net table of contents, but not the message boards or the New York Times), I can't connect to Kazaa Lite or WinMX, or dl anything with BitTorrent, etc.

Any idea what could be causing this?

Stupid question - your router is connected to the internet, right?

Another stupid question: is your modem plugged in and turned on?

Yes on all counts. Like I said, my computer registers a connection to the wireless network.