I'm setting up a custom music-sales system for a friend. He has a huge library of music for games, but no one's ever heard it, so no one wants to buy it. My PC client-server app streams the music down to the client across the internet, allowing people to listen before they buy. Then they whip out a credit card. The client won't be available for free to everyone; it'll be sent to producers at big game companies, and these producers are expected to fork over thousands of dollars per purchase (for 20-40 minutes of music). I'm writing the app in C++, expecting it to run on Windows (in fact, the client has some zippy real-time effects which make me demand DirectX). I'm looking for an integrated solution, like esellerate's in-game system, not a web-based solution. So, what CC processing service do you recommend for this application? Thanks for the feedback!