What’s missing

I’m developing a new P2P program, and I want to make it the best there is. Are you missing something out of your favourite P2P app that you think would be cool, or would make it easier to find what you were after? Any ideas on making it easier to find a group of files, ie apps, games etc? Any ideas will be considered, from visuals to file sharing efficiency to general features.
My program is well into development, it currently works, has some cool new features and is in use by some close friends who are playtesting it for me, it already contains some top secret enhancements, details to follow.
Ideas for a great P2P app, email [email protected]
Laterz.