I hope this group will welcome from time to time discussions of conductors, as in some circles they are almost the auteurs of the work, usually those who get the rosettes in the Penguin Guide.  But if you've ever heard the last concert of Bernstein (Britten's "Sea Interludes" and Beethoven's Seventh, you know that Lenny had his groupies, and boy do they gush and cheer the finale.  From all I see…