We reported last month that WordPress was working on update v1.6 for BlackBerry. Now, WordPress is allowing users to join in the public beta and download v1.6! This new version has a revisited UI and some great new features that trumps the previous v1.5. Let us know how this version works for you, and don't forget to leave some feedback!
Note: If you are using OS 7.1 you may get a "907 invalid COD" error if trying to download via OTA. To fix this, you may need to copy the jad and all cod files to your memory card, and then open jad from there in order to install. Thanks to Greg @alwaysaterrier for figuring this out.