For those who want to keep up with the nightlies....
Builds 147-149 have the bound widget selection, and notification bar power settings! They all have issues with streaming music apps (Last.fm/Pandora), and they all hang when installing certain kernels.
Stay with the stock kernel and install clean, and they will all be pretty stable for you. (I have actually had luck installing over the top of CM6, but I won't recommend that route)
152 gave me random reboots, and I consider that far less stable than the others, also it didn't add anything to the other builds, probably just cleaning up/optimizing for the upcoming 6.1 release.
I'll try to flash every nightly when it is released, and report back on this thread.