There were a few videos released early on that showed some promise but I'm not sure if anything has been released to the public yet. I do know there was a schism between two groups and it's possible this delayed their work.
If you want to check out the progress of any mod I'd suggest doing a search in the Skyrim mods forum, or perhaps checking the Nexus. However a user-made mod isn't going to get released for other platforms and in the past Bethesda has said they aren't interested in releasing multiplayer expansions for their single player games. If you want you can discuss the matter generally http://www.gamesas.com/topic/1366657-non-mmo-tes-multiplayerco-op-thread/ but you're probably better off pushing for a multiplayer spin-off title
a la TES Legends: Battlespire or TES Travels: Shadowkey, rather than boosting for a multiplayer TES V or TES VI.
Also, please do not post in all caps or extra large fonts.