I got my copy yesterday but ever since I got the 54in HDTV I've had my Xbox in the living room which doesn't have access to my router. I hope to get a wireless router today and the attachment for the XBox some time next week so I'll back on live.
I dig the game so far. My major complain was that Halo was too slow and always felt to me like you were running under water. They've fixed the running speed but it still seems to me like you float a little too long when you jump. The mini-gun is pretty damn cool and the scoped carbine with the three round burst is probably my new favorite toy.
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Carpe Omni!