Meta search engines for DRM-free MP3s

There are many meta search engines for free MP3 files, but none for commercial MP3s. (A meta search engine is one that searches multiple places and compiles the results.) Since there's a large variety in what stores carry we thought it would be useful to create an MP3 store search. Check out the newest version of MP3 Store Guide which now profiles more than 30 MP3 stores and includes a meta search feature. (We're also making the source code for the search engine available for all to use and improve.) Give it a try!