You can now buy themes from BlackBerry App World which is great if you want to add possibly the most pointless software imaginable to your device.
This is a personal view, but I have never found a theme which added any useful usability, which didn’t slow my device down and which didn’t take up much needed memory.
Throw in the fact that many are knocked up in minutes and are overpriced and you start to see why I ‘hate’ the whole idea. Finally, they also clutter up most of the ESDs as chancers release multiple themes every day with a picture of a pinapple as the background to differentiate it from their other ‘picture of a tree’ theme. Grrrrr!
