Hi - The feeds look very cool! I'm wondering if someone can talk a little more about what is happening on the backend. Which sites are being indexed? How frequently are they spidered? What differentiates these feeds from doing searches from the major search engine providers? Enquiring minds want to know!
1) most english language music websites: music blogs, news and review sites. Also general websites that pass a musicality test.
2) As often as possible. Sites with RSS feeds get indexed faster.
3) We limit to music content and make sure our pages are musical. Do a google blog search for "CSS" sometime or "Air." Also, you can actually use our feeds in our own projects (according to our TOS)