Looks incredible. GOTY by far. Also wow to new game modes. Looks fantastic. This is why Halo is the best FPS ever. MW wishes it was this good. LOL.

looks more like the radar jammer, must be an armour perm.

from gaf:

Man, must've watched that video like 30 times already. Really mindblowing, not all blatently awesome but just sooo different. Really excited and at the same time a little afraid. Kinda like Shishka in that picture, but I'm sure it's for completely different reasons. Random thoughts and observations:

• At :19 you can see that the grenade tosses have definitely returned to their Halo 3 ark.
• Interested in seeing what role the phantom plays in Invasion.
• Wondering what the point of Invasion slayer is. Seems to me it would require a shitton of balancing to make sure each side can slay equally and human vs covie seems to fit objective games much better. There are enough slayer modes anyways. I wanna jump into the invasion playlist to play unique one-sided objective matches not slayer with different skins.
• Couldn't tell if elites were customizable. Think it'd be kinda dumb if they weren't, sure it wouldn't have to be as elaborate as the spartan customization but something on par with Halo 3's would be nice. hint hint
• Elites can roll eh. The roll is pretty pathetic in distance and speed so I'm not sure why they'd ever use it. Must be something more to it we don't know.
• Kinda worried about the grenade launcher. At one point the guy is carrying 7 shots with it yet it's a single shot weapon with a one-hit kill ability. Definitely not the bruteshot replacement I was hoping it'd be.
• The assassination at :12 has me puzzled. It seems like we've caught it midway through but the spartans are facing eachother, does that mean there are front assassinations in MP or did the animation cause them to end up facing each other?
• The anti-vehicle needler seems to be a missile pod replacement. I like the missile pod and don't see how this replacement improves anything. The homing seems to be more vigilant but the missiles move just as slow. Seems to be a three round burst, doubt it's semi-auto as the first and second bullet took 6 ammo off and the third took 7 off. You'd be able to unload a shitton of those if you could keep firing at that rate.
• Jetpacks are fucking awesome. Hope it doesn't result in me running into invisible walls all the time though. If elites can use jetpacks...
• The player name tag thing .seems to be like in those in ODST, four letters, maybe three letters and a number. Not too sure, just check see it at 1:07
• Seems like radar jamming is an ability (:33)
• The player at 1:24 doesn't have a radar. Could just be the gametype.
• The two spartans beyond the window at 1:19 look different in size, could just be my eyes.
• I said something about wanting a sentinal beam/quake lighting gun weapon in reach and funny enough the one at 1:20 could fit the bill. Radius seems a bit sloppy though.
• My roommate suggested "active roster" means joining in-game. I hope to hell not and the evidence doesn't exactly point to that but just throwin it out there.
• I think the game is just so different that the arena mode will be like a classic Halo mode. No loadouts and smaller, symmetrical maps. I'd be glad they're delivering something they wouldn't be otherwise but at the same time afraid they could be spreading the Halo experience too thin. Kinda stopping it from having a strong identity.

Tried to get a sense of how many maps were shown. Don't think they showed any map that wasn't in the Halo 3 beta before the beta launched so thought it could be worthwhile. Really hard to do given I don't know jack shit about the size or makeout of the map but I gave it a shot:

• One of them is definitely the powerhouse level shown at X10.
• Hard to tell if the invasion map with the brown cliff walls was not powerhouse. Mentions a smelter in a lot of the locations.
• The scene at :18 seems rather dark so it might be a different map.
• At 1:14 the map seems to be straight from the campaign footage we've already seen. "Barren Fields"
• Some scenes (e.g. :22, :29, :41, :53, 1:24) look like a cleaner environment. A really vertical area labeled "Atrium" that reminded me of prisoner as well. Some of the locations read "CIC (Combat Information Center?) Hall", "Lower Conduct Room"

Graphics and animation look great. REALLY can't wait to read some explanations/clarifications for these things from the Bungie folk. Podcast can't come soon enough.

Looks like alot of fun.. Cant wait for it.

i think the roll feature is another armour perm
a invulnerable perm also or maybe just a shield recharge?
looks like the have redone territories maybe? 1:15 generator blown
looks like more vehicle use
loving it!

more:

next to the radar to the right around 0:42, u can see names change, im assuming room names, good for tactics calling out positions within the map

Can't fucking wait

Official linkage:
http://www.bungie.net/News/content.aspx?type=topnews&link=Reach_MPTrailer

This Ain't Halo Reach! This is Halo 3

Oh wait... lol /JK

Looks impressive especially with the jet packs
Halo MP always been Fun, Halo MP is unique it ain't about the realism it just brings the fun factor in allowing the player to do some crazy Shit! the mad jumping and sniping

Game looks great - Definitely MP of the year

Thanks for the pig JaggedSac, new desktop!

That is a pretty badass desktop.  Might have to do that as well.