Help! Extreme Internet problem!

I just want to apologize for the length of this message- but you'll understand why it had to be so long after reading.

I'm using a powerbook G4 867 mhz. I've never had a problem with browsing the internet. Today I went to load up a page in firefox and at first nothing happened so i thought maybe my connection was out (i'm using cable). I checked the connection and it was fine. After like 4 minutes, the page finally loaded. I decided to try safari. Same thing. Slow page loading. I restarted my computer, and still same thing.

When I load google however, the page actually loads fairly fast. If I search something on google it also loads fast. But if I try to click on any of the links, again very very very slow. It took me like 20 minutes just to get to this page.

This has never happened before. I recently updated mac osx (tiger) to the newest update a day or two ago, if that makes a difference, but that didn't really seem to affect my internet browsing before.

Any suggestions?