This is common trend in the BlackBerry space. We see a company such as yFrog add support for another application like Seesmic, and then they launch an app of their own. yFrog have announced their BlackBerry Twitter app with lets you share photos and videos on Twitter from your BlackBerry.
What do you guys think? Is this enough to get you to switch Twitter clients? Or will you run this in conjunction with another Twitter app?
Download it by going to http://toolbar.imageshack.us/blackberry from your BlackBerry browser.