ButterMup

kgilly? Jimi?
So help me, you two little hellions, if I find out you're downloading and burning tracks from any artists who aren't on the "Big 5" major labels, there are going to be about 20 less revenue-filching little fingers typing away on these boards!
(...The Big 5, for your future reference and continued posession of opposable digits, being AOL/Time-Warner, Sony, Bertelsmann Music Group [BMG], Universal/Vivendi, and EMI. This includes all 50-gazillion subsidiary labels, as well, so basically, about 90% of the music anyone listens to is still ultimately open for your purlioning pleasure. That seems fair, ja?)
You can rob those fuckers blind, until their respective CEOs are selling polished apples on the streetcorners, and no self-respecting music fan - or musician, for that matter - would so much as shed a tear, but don't go copping from the coffers of any indies, you dig?
The little labels are the ones who rely most heavily on album sale revenue to not only break even, but to expand their rosters, pay for additional advertising, studio costs, manufacturing, touring, merch, and so forth. Without the corporate backing enjoyed by the likes of the Big 5, every indie album downloaded instead of sold is a very direct deduction from the label's net revenue.

Do a quick little background check before you cavalierly snatch songs out of the ether, and help slow that inexorable march toward a future without anydamnthing at all worth listening to, wouldja please?

Oh, and for the record: DJ Dangermouse - 'The Grey Album'.
I'm no great fan of the Beatles, nor of Jay-Z, nor of DJs in general, but this album was actually quite musically sound, and daring enough to be almost too fucking clever for its own good.
It really got the Majors' knickers in a knot over copyrights, leading to a retaliatory, knee-jerk attempt by EMI, not only at banning all sale, transfer, and distribution of the album's tracks, but to destroy all copies of the album. In turn, what ensued was an absolutely awesome and supportive Digital Distribution firestorm on the last Tuesday in February, depsite the swirling torrent of cease-and-desist orders being thrown around like confetti.
Genuine, fist-pounding, disobedient, scoffing-in-the-face-of-The-Man™ controversy is something that not nearly enough music (which is to say, none at all) inspires anymore, and that achievement alone is enough to put this album at the forefront of my list, hands down.