I decided to pose the question to Twitter, and for the first time saw the retweeting grapevine in action when I started it. It's pretty neat and a bit scary. XD
Thanks everyone who answered!
Strongest ones seemed to be Blue Moon Rising by Simon R Green, and Patricia Wrede, apparently the Enchanted Forest Chronicles ( "Dealing with Dragons" and its sequels).
Here are some answers:
I'd love to know. All I can think of is a knight (female) saving a prince from a dragon by reasoning with the dragon.
Maybe not podiobooks. Maybe podcastle.
I might be thinking of Accounting for Dragons. http://tinyurl.com/yh7h4k6
Might be Dragon hunt - http://podcastle.org/2009/02/16/podcastle-41-dragon-hunt/
or What Dragon's Prefer http://podcastle.org/2008/08/23/podcastle-miniature-009-what-dragons-prefer/