CyanogenMod 10 Stable Build Based on Jelly Bean Released
Fans of the alternative Android distribution CyanogenMod are now able to download version 10, which is based on Android 4.1 (Jelly Bean).
The stable version is so far only available for the more popular Android devices at the time of this writing, but more than 20 additional smartphone and tablet models should be moved from a nightly to a stable version soon.
Besides the 4.1 updated, the developers also added an update manager for CyanogenMod, which is now available directly via the OS UI.
The developers also announced that they have begun working on a Android 4.2 version for their distribution as CM 10.1. There is no information which major features will be added and removed in this next version, though the team did guess that the CM clock will be replaced with Google's version and the Quick Settings will replace the Notification Power Widgets.

Project butter made the OS so much more responsive, I am now unable to go back to any pre 4.1 based builds now.
The Cyanogen team does a great job bringing the OS's to our devices.
I'll give CM10 a try when they start releasing nightly builds for the S2 (based on the stable).
Cheers!
Just try existing nightlies. My Galaxy Tab P1000 is running CM10 nightly and it's more stable than stock, will never go back.
Meanwhile at CM:
1) http://www.cyanogenmod.org/blog/psa-transition-to-cyanogenmod-org
2) http://www.cyanogenmod.org/blog/domain-situation-has-been-resolved