I like the idea. Not sure about making money from it, but definitely see it as useful.

typo on home page... "Also contact us if you want to contribute by helping uns organizing the links."

Can you add more specific information to your search results lists? For me right now, this page... http://www.learntoplayanything.com/component/tag/green%20day returns 20 results that all are "Boulevard of Broken Dreams " - would be more useful if there was some additional info to differentiate.

On this page: http://www.learntoplayanything.com/component/tag/green%20day... Which is the third page, the paginated link to page 1 actually goes back to the third page. The link to page 1 on all paginated results pages seems to link to the current page instead of page 1.