A co-worker mentioned the RIAA Radar, it helps you quickly and easily discover if you are sponsoring RIAA or if you are targeting your ripping at the right people. Nice.
From their frontpage they have a quick overview of how it works:
When you run the RIAA Radar, it uses Amazon Web Services to get the album information. It then checks the record label data given by Amazon against a local database based on the official list of RIAA members (but heavily added to beyond that), and returns the result based on a match.