Amoeba Records -- the amazing California music superstore -- has relaunched Amoeba.com, with a huge selection of downloadable music rarities, digitized from old vinyl. In some cases, the store has tracked down rightsholders for these out-of-print rarities, and cleared the music for sale for the first time; in others, it's escrowing the sales funds for payment to rightsholders when and if they present themselves.