I'm a little late to the party, but the album in heavy rotation on my headphones this week is American Edit, a mashup of Green Day's American Idiot by Dean Gray (second-level nom de plume of Party Ben and Team9). If you haven't heard it, you can defy the Warner Bros. injunction and grab the tracks here. Hey, Billie Joe Armstrong thinks it's cool. (And here's a complete list of the samples used.)
I'm also listening a lot to the new Secret Machines album, Ten Silver Drops, which they've released in its entirety on iTunes a few weeks ahead of the street release.