That shows how subjective opinions about music can be. I think Eva's version of "Somewhere Over the Rainbow" may well be the best version I've ever heard.
She had a beautiful voice and a very rare gift of knowing, very intuivitely, how to communicate the essence of a song.
Eva's cousin maintains a very nice Eva Cassidy website. I don't have the URL handy, but its on the page of artists links on the Folk Roots/Folk Branches site.