I'd be happy to sing or play fiddle at Boskone, as long as you don't want too much in the way of rehearsing before Arisia. I'm a mezzo, happiest in the alto/high tenor range. I also have a band (Stranger Ways) consisting of fiddle, guitar and drums, along with singers (one of whom is not playing) that might be recruitable if that's a useful arrangement. I'd have to talk to them, of course.