I don't watch much live TV anymore (mostly netflix or catch shows later online).  But I did see some ads for it on Discovery Channel like you said.  Oh and I saw one on Spike.

I'm still waiting for the new live action trailer!!! Has anyone spotted it yet?

Every time I turn on the tv

Just in case your forgot... heres Halo: Reach again!

Yea, it's getting pretty weird for me. I'm seeing one every 30 mins or less....

its possibly been going on for 3 weeks. not mass adds on tv but thousands of articles and videos on ign and gamespot per day, and that is bigger then ads.

I saw advertising on the Military Channel and Comedy Central. 

Bungie said the live action trailer won't be out till close to release like 2-3 weeks out from release so I wouldn't expect it till late August or early September.

Though I would love for them to change their mind and release it sooner.  

I love watching the commercial. Having music play in the middle of the day definitely brightens my spirits.

Ive seen it on Adult Swim, MTV, Spike and others...they're starting to go all out with promotion..i jus wish they wouldve promoted Alan Wake a little never saw one add for it...i mean they promoted crackdown and its a complete rehash of the first game

I saw two commercials around 1am on Fox two days ago.  Crazy.