Brian,

Thanks for writing!  We do hear this request occasionally, and I've created another feature request on your behalf to add this new category of repertoire into SmartMusic. 

Adding a new category of repertoire would be a long-term programming challenge, so I do not have an exact date when such repertoire might be available.  The best way to get a request for specific repertoire on our list is to submit it to our Repertoire folks at this link: 
http://www.smartmusic.com/FindMusic/Request.aspx