search yielded a bunch of topics about multiplayer rules, but it was mosly just fan ideas.

sorry, no official ones yet.

I am hoping we see some soon though.

Nope. Though, all that may be needed for good multiplayer is a balanced application of the first turn draw/attack restrictions

In the MP games I've played, we used primarily Wytefang's rules on BGG (basically you burn (#Players-1) zones to win, and you aren't eliminated if 2 of yours burn), and the games were good. For first turn, we had player 1 takes normal penalty, player 2 gets to draw but not attack, and player 3 gets to draw and attack. For more players the first guy always gets the full penalty, the last player is the only one who can attack, and the other players either draw a card or not, depending on what you feel is most fair.

The key is that no one ever gets to attack until all players have had a chance to place units.