Jilli, see if you can get a phone interview lined up with Nick Digilio at WGN radio in Chicago. He's the pop-culture guy there, has the weekend evening show (Friday from 11 pm to 2 am, and both Saturday and Sunday nights--can't remember the times though), and talks to people from across the entertainment spectrum. He had a great segment with Tim soon after Firefly finished, and is really good at interviewing.
And overnights on WGN will get you heard in 38 states over the air plus internationally on the internet. Just as an FYI.