Yes Session is in the store! IT'S FREE FOR THE FIRST 100 DOWNLOADERS and I'm up to 44 so far.
Yes Session is an interesting experiment in self assertion (well, for me at least - it's in my own voice as shipped.)
it listens to your ideas, and then responds with encouragement when you pause.
You can also put your own audio in via the iTunes Document interface.

Future enhancements - if any - will be the ability to record your idea and mail it out (sans encouragements...), more voices, nicer graphics.