I just got a BlackBerry about a week ago and I've been looking for some way to view TV listings. I couldn't find anything, so I made a simple page that displays what's currently playing on a bunch of different channels.
http://blackberry.gimmeallthe.info/tv.php
A few channels don't work and a couple of time zones are giving me trouble (Alaska & Hawaii), but otherwise, it seems to be working. Let me know if you have any feedback.