i think the new burgerz march13 kang has beats audio and new Adreno libs included, so I'm downloading to try it out.
The Launcher2 is now more 3d-ish with apps drawer animations and stuff, looks better
Music sounds nice, but I didn't spot any huge difference in playback quality
EDIT: there is also a flashable zip for data2ext for cm7. Is it enough to flash it or does something more needs to be done?