I'm trying to work out if this will be more of a kids games or will appeal to older gamers as well.
2010 could almost be the year of the MMO with a bunch of high profile MMO's set for release this year. Lego, Star Wars, Star Trek and WoW: Cataclysm. Not sure if the Stargate MMO will ever happen and actually be decent. I really like the idea of MMO's and playing with friends but I'm doubtful I'll ever really play one unless the barriers for entry are a bit lower eg. a bit more casual and free or very low subscriptions. Something like Borderlands if it had a bigger world with larger servers.
I'm actually hanging out for Tiger Woods Online

Free to play in your browser (it looks nice) with a bunch of community stuff around it for groups and tournaments etc.