Age of Empires Online has opened their beta today for anyone who would like to receive a key. The keys are limited, so hurry. I managed to get a key today, and I sank a few hours into it. I will be giving my impressions in the coming days. From my limited amount of time with it, I must say that I'm having a lot of fun. I'm at level 6 with my civilization. It took me a while to figure out the tech trees and everything, but that's what happens when you jump into the game without reading anything. Try to pick up your key here.