Twitter for BlackBerry 126.96.36.199
the author of this app says:
With Twitter for BlackBerry smartphones, you can get your Direct Messages as soon as they arrive. It even works with your BlackBerry Browser and BlackBerry smartphone camera, so it only takes a moment to post a link or upload a picture directly to Twitter. Plus, you can follow friends, search for a topic of interest, and more.
BlackBerry Device Software Version 4.5.0 or higher.