Have yout tried it on WiFi?
If it works on wifi then something with your provider is wrong.
If not, something with your droid is wrong.
Install an alternative browser (dolphin) from market and try that too!
It's weird because I can get local radar through that particular application, and the GPS works fine but if I try to get onto the web it is super slow. At first I was using google and got nowhere, I just downloaded the wifi widget and I have a router in my house and it seems to have hooked up but running way to slow