Posterous for Blackberry
One company that stood out is called Posterous. Their services enables you to update your twitter account by simply sending them an email to update twitter. You can just write your post on the subject line of your email and that's it. Posterous even shortens the links in your post. Using posterous you never have to install any clients or have to browse their mobile version that takes time to load. Currently Posterous support uploads to Youtube, Vimeo, Flickr or post updates to blogs using blogger and wordpress.

link: Posterous.com