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!"
I've relied primarily on my cell, but not solely since 2000. I keep my landline around simply to get the DSL combo discount. It is cheaper for me to carry a basic landline packaged with DSL than to carry DSL only. I do occasionally send faxes for work also...