Back when Motorola announced the RAZR M, HD, and MAXX HD, they promised Jelly Bean before the end of the year. Looks like the M may be first on the list to get the update, because a leaked build showed up online last night. We chose to hold off on posting, as Artem started this thread on XDA so we could get some feedback before telling users to flash a buggy or incomplete ROM. The initial reports have been good, so we feel comfortable recommending the ROM at this point.
As always, though, there are caveats to be aware of.