I got the cingular blackberry 8800 yesterday and they transferred everything from my 8700. I was able to access the internet with no problem through the browser or media net. Then since about noon yesterday, until current, i just get a "unable to connect to internet" message with browser and media net. Any ideas?

Try a hard reset (pull battery for 30 sec)

If that does not work then try resending your service books...

If that does not work then call Cingular and see if it's a problem on their end with the provisioning on your account...