Since launching FrontierVille 2 weeks ago, the game has grown to 5 million daily active users (DAU’s) making it the fastest growing game this week on Facebook by far.

That’s the good news for Zynga. The bad news? It’s not enough to stem the tide of losses across all Zynga games, which for the first time since last November has dropped below 200 million monthly active users (MAUs).

For more details, read the analysis at Inside Social Games.

The big question is: will the gains from FrontierVille offset the losses in FarmVille in 2010? And if not, then what?