Halo 3: ODST is going to be a fine game, but Bungie's got to get a better pitchman than developer Lars Bakken. When asked by The Guardian about additions to the game, Bakken explained, "Obviously the things that have been brought over would be the weapons, the enemy types – those kinds of things haven't changed. Everything else is completely new: your character's health model, the fact that he doesn't have a motion tracker, he can't dual-wield, he takes damage when he falls off high surfaces, his health doesn't regenerate. All those things were not in Halo 3. That's very different."
... So. It's like the Halo everybody loves, except with the addition of taking things away. It's a shame Bungie's done with Halo after Reach -- we'd love to see them add things to Halo until it's basically just a guy in football pads with a potato gun going against the Covenant.