The only page that works for me is rmrk.net. Facebook won't load, gmail won't load, ign won't load, myspace won't load, any other website I try won't load.
rmrk.net, however, is incredibly fast and loads immediately.
Not really looking for answers, I'm just really annoyed about this.
Anytime something odd like that happens for me, I usually restart my computer, and then unplug/plug in my modem. This usually fixes it, but I can't say for sure if it will help you in your situation. This seems to happen to me mostly when I'm either downloading torrents, as my bandwidth is being used, or right after I've downloaded a particularly big file. It also sometimes occurs after I've left my computer on for a long time. Hope this helped~