A great find: Ethan Iverson links to a YouTube excerpt from the Soviet-era cartoon Ballerina on a Boat, with music by none other than Alfred Schnittke. Mr. Plus mentions several favorite Schnittke works, all of which I endorse; but for me the composer's masterpieces are the First Symphony, the String Trio, and the Faust Cantata (later adapted as Act III of his Faust opera, which deserves a second chance). If you're looking for more information about Schnittke, you won't find it at AlfredSchnittke.com, but it's fun to check in there anyway.
