Just catching up- I think it's FAB that B contacted you about the contacts (laughing at my own joke there!)
I would e-mail him back, myself. Just so say thanks ever so much for passing that on and that you'll follow it up. And then I'd say see you at the concert or words to that effect.
My thinking is that becuase he's gone out of his way to contact you, you should respond in kind- keep communication open. If I mailed a friend information and she didn't reply and then just showed up at something the next day I'd find it a bit wierd. MWD says that if there is a positive step you should respond equally back (but not be overly enthusiastic). (Sorry to disagree with you guys, K and Ess!)
So glad the performance went well last night. YAY!!
