MIUI has been updated to v4.1 JELLY BEAN! It is available for multiple devices. The main feature here.. is.. well Jelly Bean!
There are a few super minor bugs Network location is not working, and there may be a blank screen on bootup. Other than that everything is running smooth as butter. You can expect all the features that you have come to know and love from MIUI like endless themeing options, MIUI batter bar, MIUI file manager, MIUI music, MIUI clock, MIUI camera and more!
More Info and Rom downloads here MIUI.us