I logged into my Tumblr this morning and noticed they released an official Blackberry app! So far it seems to be pretty good, a lot like the iPhone one!
I can't post a link because I don't have enough posts but if you log into your dashboard from your Blackberry there is an OTA link.
Very nice! I like that you can at the least connect to see the dashboard, though app integration would be awesome. Definite upgrade over the other one.
Posted from my CrackBerry at wapforums.crackberry.com