It's a terrible shame that Jeff Buckley couldn't share more of his musical gift. However, the music that we do have from Jeff Buckley is tremendous. You may be familiar with Jeff Buckley's work (especially his cover of Leonard Cohan's "Hallelujah"), but in case you're not, I'd highly recommend taking a listen.
Here's Jeff Buckley performing, "Lover, You Should've Come Over", live in Chicago-1995.
If you'd like to learn more about Jeff Buckley, take a look at his website.