If Twitter can have an official app for the BlackBerry, so should Tumblr. And, they do:
Tumblr is a “true” microblogging service in my mind. While the better known Twitter needs 3rd party services to post images, audio, and video, Tumblr provides these features natively. Their iPhone app was a mobile posting pioneer back in the old days (2008). Now if they would only provide a Tumblr app for Android.
You can find my Tumblr experiments at:
I use it to integrate Qik, YouTube, conference/travel photos and incidental short form blog posts.