What forum software integrates best with VSD, does anyone have any experience with any of them.

I've used Simple Machines.

Have any examples of what you have done with it?

I don't have many users. They seem to like Facebook better.
http://www.selkirklake.net/forum/

I use SMF also and find it extremely easy to use as well as very customizable. I have a few setup, but unfortunately they are private sites so you wouldn't see much of them anyways so I won't post links. It is a really good setup though, give it a try and see how it works for you.

I use the free Yahoo groups and link to it. Works for me.