Emusic.com has just added Matador Records to it's growing list of labels
http://www.emusic.com/labels/7576/
To my knowledge Emusic is the only place housing such a large database of affordable, downloadable, legally available, Electronic, Music.
A great resource for what's good there is on the Emusic Coolstuffdownloadguide:
http://www.mono211.com/emusic
Shimone/Justes
http://www.staticbeats.com | Electronic Music For The Mind
http://www.shimone.org | Pictures From The Soul