Hi there
Great idea to collect all useful links in on place.
I can recomend SHAPE Services website shapeservicesDOTcom with many useful Softaware for BlackBerry Owners.
There are many applications for BlackBerry which might be interesting for most of you: IM+ All-in-One Mobile Messenger, IM+ for Skype, Voice Recorder, Mobiola xPlayer, GPSed and many more!
Best,
DoLphin