If you already have Wordpress installed, chances are you've been notiified of this update. However, just in case you missed it for some reason or are unaware that such an app existed. You can now grab the latest version of Wordpress for BlackBerry from BlackBerry App World or direct from the Wordpress website. Version 1.2 is what you will find available. With version 1.2 you'll find some nice changes to the application as a whole.
The community behind Wordpress is not going to be slowing down anytime, so the application will certainly keep improving as it grows older. These updates are all welcomed changes. You can read the full details of the change log via the Wordpress For BlackBerry website if you head on over there.