Not sure if you ppl know this but starting at 9am today and all through the weekend, you'll get double exp points for online multiplayer matches.. If like me you're looking for your 50 or 100 rank, this wll be a great help.
Here's the post from Epic..
Gears 2 double XP weekend incoming! Play Gears of War 2 Public multiplayer matches on Xbox LIVE this weekend and earn double the experience to increase your multiplayer rank. The event kicks off on Friday, May 15, at 5 AM EST (9 AM GMT) and runs through Monday, May 18, at 9 AM EST (1 PM GMT). Get some friends together, play to win, and boost your rankevery successful kill and every capture gets you that much closer to the fabled rank of 100. Keep your eyes on gearsofwar.com for more Double XP events!
And here's the link http://gearsofwar.xbox.com/Templates/Secondary.aspx?id=1636
Looks like this kinda thing might be happening more often....