I run a "modern" BBS, Xibalba. Something I find is actually quite a few "callers" visiting the board are new blood. Younger generation that never lived through or touched a BBS but usually fall into one of two camps: 1 - "I'm tired of the modern corporate Internet", 2 - I just want to learn about history.

People still login to play games (I'm writing a new one!), and chat. Downloads here and there when you have hard to find history items, etc. Certainly nothing like it's heyday, but enough to keep me happy anyway :D