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!"
Yes the enV Touch will have a 3.5 mm Headphone Jack. All in all, this is looking to be an excellent device. I have heard that the new touchscreen feels a lot like the iPhone's in the way it responds and the smooth scrolling. I can't wait to get my hands on it.