How do I find someone's gmail address........Is there a directory or at least a forum to request someone's gmail address?

I would start with name.surnamegmail.com then continue with namesurnamegmail.com. If that is not working find him/her on Facebook and check his Info page :)

Name.Surnamegmail.com and Surname.Namegmail.com makes no difference (iden for @gmail and @googlemail). That's one of the many reasons why Gmail rocks.

Oops. I meant name.surname and namesurname (mind the dot)

I would not limit to facebook. Try linkedin, plaxo, zoominfo, myspace, etc. It all depends on the profile of who you are looking for and his/her name.

Bob Smith will be hard, but Michael Zwal will be easy.

If person has a blog – like I do – [flyerblogs.com]
post a comment. If person works in a small company, just find their website and use the contact us. This works for me. Sometimes I just pick up the phone and say "Hi Mike, whats your email"!