I haven't really had that much time this weekend to play the Halo Reach: Beta, but I got a little bit of time with Invasion yesterday and still enjoying The Arena play I am getting in. I think I'm going to enjoy the idea of logging in every day, just play a couple of Arena games, to keep my hand in.
 
I think Invasion is really going to be made or broken by the community. I've really only played Objective Invasion, but I think after a little more time and perhaps played with friends I might see myself playing alot of this mode, than previous varied gametypes, offered in Halo 3.  
 
Time will tell and we will see.
 
This blog would have more images in it, if I wasn't capped.