It’s a constant new feature race between Tumblr and Posterous at the moment. As fast as one reveals a new feature, the other reveals something else equally interesting.

And now Tumblr has revealed an official BlackBerry application to let you post text,photos, video, audio and links. It was developed by Mobelux, who also did the Tumblr iPhone app. Apparently BlackBerry Storm 2 owners might experience some issues, but there’s already a workaround.

It does just about everything, including letting you send images and video from your library, or record new video directly from the app itself.

Microblogging has always fitted mobile devices perfectly, whether it’s Twitter, Tumblr or Posterous, and the expanding range of applications which simplify the process of adding more to your content will only improve matters. There’s actually already a WordPress app for BlackBerry, but I’m not sure I’d want to type a typical entry of mine on a touchscreen or smart phone keyboard. But allow me to fuel a microblogging with link posts, short entries, videos and pictures, and that’s the perfect mobile form of expression.

Tumblr are hosting the app download as a direct link.