Anyway, I'm sure the music industry really cares what I think about variable pricing; I just wanted to mention it, as an excuse to mention that the Greencards' new album is available as part of the "Next Big Thing" promotion, at $5.99. Almost as good a deal as eMusic (though you're stuck with DRM at iTunes). Rodrigo y Gabriela's eponymous debut is also available, at $6.99 (I've seen the album on sale at Best Buy pretty consistently at $7.99, and now it, too, is available at eMusic). Hard to go wrong with either of these, wherever you buy them.
UPDATE: I've added a playlist of the artists mentioned in this post via iMeem. First time I've written about artists available for streaming through their service. Lots of Sara Bareilles, less Rodrigo y Gabriela, and nothing from the Greencards' latest album, so I through in their only song available from iMeem, "Time." I'll look into the whole uploading thing later, and see if I can update the list with more of their stuff.