Speaking of agents, have a look at Firefly: was the Media Lab HOMR (Helpful Online Music Recommendation Service), formerly known as Ringo, on which Clifford Stoll comments in his new book Silicon Snake Oil -- Second Thoughts on the Information Highway. Imagine HOMR learning so much about your musical tastes and your disposition that, from this season's concerts of the Boston-based Haydn and Händel Society, it will select -- and book -- for you without any hesitation Haydn's Symphony No. 103 in E flat, "Drumroll" and Vivaldi's Concerto in G Minor for Two Cellos?