The numbers are out for the Xbox LIVE activity for the week of March 31st thanks to Major Nelson's blog. The rankings are based on Full purchased versions for Arcade titles and unique users that are playing. It’ll be interesting to see if Call of Duty 4 remains on top once the Halo 3 Legendary Map Pack is released, or if Call of Duty’s Variety Map Pack will keep it on top.
Xbox 360 Top Live Titles
1:Call of Duty 4
2: Halo 3
3: Tom Clancy's Rainbow Six Vegas 2
4: Guitar Hero III
5: Gears of War
6: Rock Band
7: Army of Two Demo
8: FIFA 08
9: Forza Motorsport 2
10: Army of Two
Top Arcade Titles
1: Mr. DRILLER Online
2: DOOM
3: Brain Challenge
4: N+
5: Battlestar Galactica
6: UNO
7: Worms
8: Assault Heroes
9: Pinball FX
10: Bomberman LIVE
Original Xbox Top Live Titles
1: Halo 2
2: Star Wars: Battlfrnt 2
3: Fable
4: Counter-Strike
5: Battlefield 2: MC
6: Call of Duty 3
7: Ninja Gaiden Black
8: Doom 3
9: Conker: Live Reloaded
10 Rainbow Six 3