I just downloaded and began use a new application for my Blackberry, the WordPress Blackberry App. With this application, you can update posts, write new posts, moderate comments, edit and post new pages, and more.
This application is much better than anything that is out there. Before I would have to send an email or fight through the website on my mobile device. But now I have an app that is developed for my phone. Something that is much easier to use.
It is still in Beta, but it is really stable and I enjoy it. Check it out.