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!"
My grandfather used his. He's thrilled, picture quality is higher than it's ever been for him. You either get 100% of the signal or you don't, so no more fuzz. Plus he gets a ton of new channels now (PBS here multicasts in SD AND has an HD feed, NBC has a second channel on multicast as well).
I'm thinking about really blowing his mind by buying him an OTA DVR for Xmas.