Here ya go!
First, here's a free sample libraries of orchestral sounds and effects. An interesting idea!
Second, via Jewschool comes a link to emusic.com. They'll give 50 free mp3's to start and they've got some interesting stuff. Worth checking out. In addition to albums by Matisyahu and Hassidic New Wave, (I recommend "Kabology"; I seem to have misplaced my copy of it), they've also got interesting releases by Adrian Greenbaum, Theodassi Spassov, David Grisman AND Denny Zeitlin, Medeski Martin & Wood, Brad Shepik, and Veretski Pass among many others. Note: these are not all "Jewish" or klezmer recordings. Your tastes may vary!