Apple announced today a new Complete My Album program on the iTunes music store: If you've previously purchased single tracks from an album, you can get credit for those tunes when you go to purchase the full album. (Previously, if you bought a single and then wanted to buy the album, you paid the full-album price and ended up with two versions of the single.) For the next 90 days, the program is retroactive to include any singles you may have purchased dating back to the iTunes store's debut.