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!"
Oh ok, I thought you were talking about the user storage system, not the bus-to-RAM part. That said, presumably regular HD camcorders have the same issue and have solved it too, is there any reason why their approach wouldn't work here too?