camcorder includes the Canon HF S series and Panasonic HDC-TM series. This assumes your version of iMovie is at least '08... or you are willing to pony up for FinalCut Express 4 which works great with AVCHD/MTS camcorders. Moving up to the current version of iLife so you can get to the newest iMovie version would be worth it...
The MacBook Pro has a firewire port, so that means you get to add the Canon HV40 and Sony HDR-HC9 to your list.
I have a MacBook Pro Core i5 2.4 GHz with 4GB of RAM, running OSX 10.6.4, and I'm wondering about a good HD camcorder. I've used my friend's Sony HDR-CX550, which works with iMovie, but am wondering if there are also others that have good quality, and that work with iMovie. I could spend up to $1200, but of course cheaper would be better. Any comments on this matter are greatly appreciated!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic