Radiohead are marking the release of “Nude,” their second single off In Rainbows, with a remix contest. Fans are given the opportunity to buy the isolated tracks (vocals, drums, etc.) from “Nude” and create a remix of their own, which can then be uploaded onto Radioheadremix.com. The stems are available on iTunes now. After uploading your remix, listeners and users of Facebook and MySpace will vote on the remixes they like the most. There’s no prizes involved, but “Radiohead will listen to the best remixes.” There is a rub, however: The five “Nude” stems cost ninety-nine cents each on iTunes. This new contest comes two weeks after the band announced they would also host a video competition.