The first report examines the data for October this year. The top 5 MMOs by subscription in October were World of Warcraft with 26.03% (surprise!), Second Life with 18.86%, Guild Wars at 12.6%, Knight Online with 11.9%, and Dofus on 9.73%. WoW, SL and Guild Wars I could probably have given you, but I had not realized that Knight Online and Dofus were so popular.
Other interesting tidbits: Lord of the Rings Online hit 300,000 subscriptions, EVE Online overtook EverQuest II and Vanguard grew a little, but still isn't doing too well. Assuming that the VOIG data is reasonably accurate (something that MMOCrunch themselves say they wanted to be sure of, and watched the site for a few months first before running the article) this should be an interesting feature to watch in coming months.