I stumbled across a nice looking Facebook App, Castle Age. Based on the ad I thought it might be an OSG but it turns out to be a re-skin of Mafia Wars (not that there’s anything wrong with that).
For more info you can check out Inside Social Games (sorry for all the ads there, not my cup ‘o tea either).
Anyway, it seems like they’ve since resolved the conflict and the game is pretty fun. If anyone wants to help me defeat Krull, the Orc Captain, you can find me as Oliver Godfreed on Facebook.