Screaming Toaster has just released Wicked WordPress App For BlackBerry. As the name implies, Wicked is a WordPress editor for the BlackBerry that actually compares very well to the Official WordPress App for BlackBerry.
Truth be told, Wicked is probably better than is WordPress for BlackBerry at this point, which is still in beta. The problem, however, for Wicked is that it costs $30 per year to use compared to WordPress for BlackBerry being a free BlackBerry download.
Wicked WordPress App for BlackBerry does offer a 14-day free trial and you can find more information about the here.