Ultimate Baseball Online - Rise Of The MMOSG?

Cobol Junky writes "Ultimate Baseball Online, a game claiming to be the first MMOSG (massively multiplayer online sports game) has recently transitioned into free Beta status. Each player's character takes a position on the baseball field, and can improve their skills and stats by gaining experience, just like a regular MMORPG. UBO is being created by NetAmin, the creators of an scrapped MMORPG called Fallen Age." This title has been in development for a while, and a GameSpot preview reveals more, but what other genres will get tarred by the massively multiplayer brush before long?