Amazon - Daily Deals on Digital Downloads
Amazon has daily deals on digital downloads. Every day there's an album you can download for $1.99. Recently I've gotten a digital copy of David Bowie's Heroes, and several others, including the soundtrack to the new Hannah Montana movie, because you know what a huge Hannah Montana fan I am. Ahem. Today, Sunday, it's Andrew Bird's excellent Armchair Apocrypha. He's more than amazing. I never thought I'd be wishing there would be MORE whistling in a song. He does things his very own, indescribable way.
It's easy to figure out how to download, and it works fast. You just download their little downloader thing, and you're set.
As well, they have all sorts of deals on other albums. Every Friday they have five albums for $5.00 (or something like that). As well, other specials, like this album (below) I like quite a bit, from Great Lake Swimmers, who sound a bit like they're halfway between Iron & Wine and America (in other words, very calm and plesant, and with interesting things to say):
Great Lake Swimmers