Let the hive mind of Engadget get that for you.
"I've found myself using my PC for a lot of conversations lately, and I'm also considering recording a podcast to share with anyone who will listen. There are tons of USB headset / microphones out there, and I'm hoping someone has some solid recommendations based on experience. I'll consider both headsets and standalone mics, by the way, but I'd like to keep the bill under $100 if possible. Help!"
DTS is mandatory according to the spec.
As far as HD-DVD 1080i ALWAYS referenced the "output". Since a vast majority of films are recorded at 23.97(24p) it makes no sense to store the film in an interlaced format. Fear not about 1080i outputs. If you have a de-interlacer in your 1080P set it'll reassemble the interlaced fields back into a progressive picture via a feature called Inverse Telecine.
Bring on the High Def!!!