Promotion of the musician in the network?

myspace.com
last.fm
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If the material is interesting, these two sites will lead you to where you need. Although it depends on what you mean by "electronic music".

Make dochazkove promotional portfolio website (photographs the scenic image and demos). Spread the link to it (you can just send to the Agency by e-mail). And, you can turn on the radio (especially Internet) and send them the logs for setting in the air.
Nothing new in principle, is not to come up here.
ps producers here will find vryatli IMHO

Odd you should ask about it here. We have a mutual friend, a musician, who in his time had reached in the West a certain height. Ask him his experience outweighs the experience of the Habr in this area.
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And I think I know who you are planning to promote. The last couple of podcasts listened to with great pleasure.

Fill it with songs on all the popular sites, like forums and give there links. If many like it then it will go. You're not the person hyping, and his work.

First you need to come up with a unique idea related to the project, which would be perceived by the public. Then we can talk about the channels of promotion.
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But for a popular project — it's all social media. The only thing they need to do every day, to maintain interest...

Let's see how untwisted is not menestrina group "OK GO". Viral video works wonders if done with the soul.

Still there thesixtyone.com Quite well (food for thought)