Hi Fran,
I'm not sure many of the people who posted in this thread will visit again to see your message, but it sounds like many of them could share more stories. Unfortunately, BikeForums does not permit users with less than 50 (I think) posts to send private messages, so you would have to provide a means for them to contact you. Obviously, you don't want to publish personal information to a public thread, but some people leave an email address that has been 'disguised' so as to prevent spam (e.g. "user (at) wherever (dot) com" instead of "user@wherever.com").
You might also try contacting Freddy Parr. He worked with Greg and had many fond memories of him. He also may be able to put you in contact with others who knew him well. You can probably make contact with him through here:
http://www.framebuilderscollective.o...311-Fred-Parr&.
You may also be able to contact him through this webpage, which I think he started, but may no longer be running:
http://www.cycledesignusa.com/
Patrick