ShockTillYouDrop.com has an exclusive look at a third TV commercial for Cloverfield. This one is straight out of the original teaser trailer, with some added special effects on the explosion.
Also, there is a high-quality version of commercial #1 on MySpace: http://vids.myspace.com/index.cfm?fuseaction=vids.individual&VideoID=24300714
You can now see all of the commercials on YouTube here:
Commercial #3: http://www.youtube.com/watch?v=Y0Px_U4diqk
Commercial #2: http://www.youtube.com/watch?v=YLLnLvVT1Kk
Commercial #1: http://www.youtube.com/watch?v=vYKaKbEhTRU
* Thanks to The Enchanted One and Jon for the hot tips!