Steam Says "MMO's: It's Free to You!"

Steam now loves free! There are several Free to Play MMOs out in the internet, uh, sphere, but can the average gamer keep up with them all? If you don't keep your eyes plastered on sites like Massively or MMORPG.com, you might not know what's out there to play with no affect to your wallet. So far, the list is small (there are scores of F2P games), but there are so many games which should be listed in the Steam Store.