I just fixed the link for Ten Concert Pieces for Cello and Piano (http://www.sheetmusicplus.com/title/Ten-Concert-Pieces-Music-Minus-One/3365429?id=65325) in the Learn To Play (http://www.thereminworld.com/play.asp) section. This set features sheet music and A karaoke-style CD of piano accompaniment you can use to practice theremin with. Those of you who have Clara Rockmore's "The Art of the Theremin" will recognize "The Swan" (Saint-Saƫns) and "Habenera" (Ravel). The CD includes 2 versions of each song - one with and one without the cello part.
Here's a link to more play-along CDs for cello (http://www.sheetmusicplus.com/formats/Play-Along-Book-and-CD/70?fo=70&sort=top_selling&rows=25&in=17&id=65325) (with sheet music) from SheetMusicPlus.com.
Here's a link to more play-along CDs for cello (http://www.sheetmusicplus.com/formats/Play-Along-Book-and-CD/70?fo=70&sort=top_selling&rows=25&in=17&id=65325) (with sheet music) from SheetMusicPlus.com.