Check out the latest theme creation from Ahead of the Curve Designs. It's called Promethean Slide.  Check out the features. Purchase the theme here.

5.0 Includes These Additional Features:
Gradient Scroll Bars
Gradient Message List Selector
Gradient Search Cursor
Full 5.0 Folder Support
Promethean is inspired by the Greek god of Fire.  In the myth Prometheus was the Titan who gave fire to Mankind.  Features include double sliding side Docks, and 18 user selectable home screen icons.
Six Home Screen Bottem Dock Zen Applications (User Selectable)
Twelve Slide Side Docked Home Screen Applications (User Selectable)
Precision Icon Set
Full OS 5 Folder Support
Fully tested on live devices and simulators
Requirements:
Blackberry 8900-9000-9600-9700 4.6 to 5.0 OS
Menu Gradients and Transitions are available only on 5.0 OS devices
Data Plan-Downloads/Installation OTA Only