jb, what a delightful idea. But, I hope you don't want to try to discover the identity of the Mystery Punster. He/she is having way too much fun and I'd hate to spoil it - been at it for over a year, I think.
To share a 'wit' or two - one of my favorites of the pseudonyms was "Ephstop Shutter" in a topic about photos, I think. And I remember "Jess Tubits" about the Musee Mecanique. And no one has ever commented until now.