Okay, this has to be the coolest hack of the week. Visual search engine SearchMe has just added a music search tab that brings back results with free, legal, unlimited full-song streams and cover art you can flip through. It’s CoverFlow on the Web. And it actually trumps the experience one Yahoo’s music search, which also offers free full streams through Rhapsody—but those are limited to 25 streams a month per searcher.

SearchMe instead is tapping into imeem’s vast catalog of fully licensed music. (Along with Rhapsody and MySpace Music, imeem is one of a handful of companies with comprehensive music streaming rights from all the major labels). [Correction] But SearchMe is not using imeem’s API, which originally was limited to apps on imeem itself, but has since been extended to other sites through a. Instead, it using the widget loophole in imeem’s licensing deal with the record labels. Imeem users can stream any song and create playlists on imeem itself or through imeem’s widgets which can be embedded elsewhere. (Other partners such as Apture and Slide also use imeem’s API to invoke imeem widgets).