For those of you who use Twitter for BlackBerry as often as I do you probably saw a new update notification today. Dan pointed it out to me when it updated to v2.1.0.28 which is just a small update to the previous version and after digging a bit Bla1ze @CrackBerry noticed that this version seems to just be an update for BlackBerry Curve and BlackBerry Pearl users with this in the change log:
BlackBerry Curve and BlackBerry Pearl users are now able to view a users profile page from an @Mention.
You should be able to find the update soon in App World