I started using the Windows Vista PE theme for WA2 (Aero Dark), so I decided to modify one of the Chameleon-240 backgounds to match the theme exactly. So here it is:
The colors match the Aero Dark theme, plus I gave the button bar more of a "glassy" look:
It replaces the gray background #12 (bk_12.png) - but you can rename it and replace any background you wish, such as pink - not that there's anything wrong with pink
Just drop the file into your Chameleon-240 theme folder on your device.
Enjoy!