well theres stardoll
Wolfquest : your a wolf and u hunt try to survive an
Most mmorpgs that are any good have already updated their clients for the game. You just need to go to the site. And look on their forums and they should have how to download and operate on vista. Some good games are listed here: onmmorpg.
runescape is a good mmorpg and its free with no download
Adventure Quest
check out this old school 2d mmo. http://www.crashdragon.com/MG/ML/index.html
dungeon fighter online
No. As a console mmorpg, it has even less features than mmorpgs for PC.
Runescape is a very good browser MMO it has free play and a subscription mode that allows access to more quests content and skills.
Find these on Nexon Mabinogi Vindictus
Luna online is pretty fun.
http://www.freemmorpglist.com/ has 40 pages of them.
Horse Isle and Horse Isle 2 are fun.