The new Halo Reach Campaign Trailer is out on XBLA and it made me a little more excited for the game. I wasn't looking forward to it much before the trailer... I'm not sure I'll get it on day 1 like I've done the other Halos... but maybe they'll convince me in the next month or two.

Full price games bought on day 1 for me this generation:
Halo 3
Halo ODST (ended up being $30 on Amazon after all of the discounts and credits, or else I would have waited
Rock Band 1 Full Band Kit
Rock Band 2 Disc Only (Shipped with $20 in MS Points)
Beatles RB (Was $40 at Micro Center for the first week)

And I think that's it. So, it'll be interesting if I drop on RB3 or Halo Reach, since those seem to be the only games I've gone for in the past. The Halos because they don't tend to depreciate very fast, and the RB because I thought they were a good value. Seeing how fast the prices drop on music games, however, I might wait for RB3.