If you’re looking for nearly-free recording and no hassles, you’ll want to check out Instant Teleminars. You’ll also be able to host 200 people on the call. Plus they will be able to send you questions by a web user interface.
You can test this service out for $1 and if you like it, you’ll get unlimited service for less than $50. It really is automatic. I tried it and it worked.
There are other features for notifying your guests, etc. Read more about it here.
This is the brainchild of Rick Raddatz, former Microsoft whiz kid who has launched many other marketing and audio programs on the web.