1 time only shopping at bleep.com for some super-rare Peacefrog and Warp stuff which was not anywhere available for a reasonable price, then subsequently also cut 2 of the downloaded tracks to dubplates.
I plan to start a mp3 shop for my vinyl label later this year but I'm definetly not in a hurry. Personally I am not comfortable with having "releases" sitting on a harddrive only, mp3 audio especially. I reject any DRM attached "un-music" altogether.