I have been trying out Podtrapper for a week now and although there are things I don't like about it (feature requests forthcoming) overall I don't see how I could live without it anymore. I listen to a lot of audio books and start shows without getting to finish them so the automatic bookmarking for me is essential!
I found this app quite by accident so I am going to be adding a note about Podtrapper in my sig over at Crackberry because it seems to unknown to many people.
Keep up the good work and you will soon have another copy sold.