If you were one of the (undoubtedly) many who grabbed the Halo 3 Official Soundtrack from the iTunes Store since it became available in the last 24 hours, take a look at disc 2, track 5.
"No More Dead Hereos"
From any other game publisher, of course, this would be attributed to a simple clerical error, either by Bungie or by Apple. However, since this is Bungie and Halo, it is obviously a cleverly-hidden hint for faithful Bungie fans that the Master Chief will soon have his own line of heroic sandwich cookies.
Mark "Have Blue" Levin of Freeverse has written up a Gamasutra postmortem of their port of Marathon 2: Durandal to the Xbox 360.
What's revealed is that the Xbox version isn't so much a port as it was almost a complete from-the-ground-up rewrite: