Mine works fine as well - may want to add a ? to your thread title or amend it. Check your connection settings in UberTwitter. May have to set it from Auto Network to BIS-B.
I had nothing but problems with it set to AUTO for the network. Finally dawned on me to changed that (mine is set to direct TCP) and its been solid as a rock!
I guess I should revisit this thread. The problems I was having with Ubertwitter were apparently linked to the BIS outage the afternoon/evening of 11/16. I haven't had a problem with the program since then. What a cuhwinkydink that RIM has an outage the evening I'm setting up my brandy new 9700!
Mine doesn't work either. Reinstalled numerous times. Says it's trying to access an area outside and inside my firewall and restricted by my IT policy. But the thing is it's a brand new 9700--I HAVE NO IT POLICY. I double and triple checked every setting known in the phone. Reset permissions, etc. No policy in place either. Don't know what to do, ubertwitter has worked perfectly on all my other Berrys.