Battlestar Galactica Online is in closed beta test. It is a fully 3D browser MMO with nice graphics. One thing I have learned after experiencing BGO is never to underestimate next generation browser games.
You can discover some more information about the game and in-game screenshots in this preview.
Man, was that not one of the best shows ever?! Not too interested in an BSG MMO, but it does look pretty decent for a browser-based game. Too bad they didn't go with a different format. I'd love to run around searching for the Final Five or liberating humans with Sam in the resistance.