I love Bjork! Check out the wonderful combination of instruments on this video:
http://www.youtube.com/watch?v=_qGutbLI0xk&feature=related
Upright bass, tabla, synth, flute, turntables/samples, and wine glasses (harpsichord too?). Yet it is put together so naturally, and it feels "normal" and relaxed, not to mention it is a beautiful song on it's own. How about two classical/flameno style guitars and wrenching, phone-filtered vocals? You got it!
http://www.youtube.com/watch?v=6dJAnlG7nLc
Reminds us not to be afraid of sparseness, and of simple elements. The quality of the performance and composition will carry many, many orchestrational possibilities.