EVE Online, World of Warcraft, Guild Wars, The Lord of the Rings Online, and Age of Conan are all nominated in the "Best Online Game" category. World of Warcraft's Wrath of the Lich King expansion even broke out of the genre by receiving a nomination for the "One to Watch" award. However, the big MMO on the list this year is Age of Conan. It has additionally been nominated for PC Game of the Year and Ultimate Game of the Year.
If you want to be part of the process, go pick your favorite MMO from the list for the Best Online Game award, and if Wrath of the Lich King or Age of Conan strike your individual fancy, vote for them in their other categories as well. Or you could just not vote for any MMOs at all. Your choice.