Currently still working on Universe at War for SEGA, Petroglyph Studios, also known for Star Wars Empire, might be jumping on the MMO bandwagon, as its jobs recruitment page has a current listing for an "MMO Game Designer" who is "responsible for understanding, refining, maintaining, and disseminating the game design vision, game design, mission building, gameplay balancing, and game proposal development of a Massive Multiplayer Online Game." (Thanks VE3D)