This is something I'm looking into. I'm hoping to be able to support importing some of the proprietary forScore file formats, at least to some extent. I think forScore allows setlists to be exported as a .4SS, so hopefully I can convert that into the information that MobileSheets needs. Alternatively, I could build a tool to take just list of song titles and convert that into a .mss file which you could then import.
Mike
Mike