Paul Oakenfold, Chemical Brothers/Crystal Method, Fluke and Juno Reactor are the most notable ones.
I'm not heavy into that style of music (flamenco, jazz/blues and good 'ol rock are more my forte), but I do listen to it occasionally.
Outside of the well-known and big names in electronica/trance, I've found it difficult to find fresh tunes, though I'll freely admit I don't look very hard. It seems like a good 90% of it is repetitive and regurgitated to a great degree (OK, the repetitive part comes with the genre, but there is such a thing as TOO much).
In any case, it serves nicely as background or workout music; you don't have to pay attention to it and it doesn't require a trained ear to enjoy it.
