Well look no further.
While this site is primaraly designed to promote legal mp3 websites, there's lots of useful info and links to help promote any type of site.
This website contains:

• A collection of Benways own electronic dance MP3s.
• A directory of links to the websites of bands providing electronic dance MP3s.
• A list of other directories providing legal MP3s and links to bands websites.
• A directory of links to many search engines and directories to save you searching them out when submitting your own site.
• A section dedicated to website promotion.

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If you don't know....well... Try the frames entrance and see what happens. :)