The Jelly Bean version of CodeName Android has been available now for a few weeks on several devices, but it has also seen a few updates lately that have made it a stable daily driver worthy Rom. The feature list is huge! It is based off of CleanAndroid 4.1.1 Rev4 JRO03L, it has lots of CM mods built in such as DSP Manager, T-Mobile Theme manager, T9 Dialer, Trebuchet Launcher, custom camera app, and more. It also has lots of other features from other devs such as customizable status bar, notification counter, battery icon style, miui battery bar, clock style, customizable clock color, customizable navigation bar, and to many things to list here.
It is available on the Galaxy Nexus and many other devices. Downloads can be found at CodenameAndroid.com