I wonder what ever happened to this project. lol
There's been a tiny bit of work on a Jelly Bean rom for the A855, but 4.2.1 is not going to happen. IMHO 4.2.1 should NEVER have been released, or at least not for phones. It should have been a tablet only release just like Honeycomb. User accounts for a phone? Really? What a mess it makes of the "sdcard". I'm sticking with 4.1.2.
Not from what I've been reading over at androidforums.com. It's also messing with the file structure on the 'sd card' creating the extra sub-directories for these extra users. Though they cannot do much more than run apps, no calls, no downloading.