Gotta say I am hooked on WebBBS. If cookie enabled it can do a ton of things. Like this board,it also notifies a poster when someone responds to his post. This is very effective in bringing people back to your board.
As far as no place for a link is concerned. You can still add your signature block at the end of your post. I guess that is a way to lose less visitors but if your site is interesting enough, they will always come back.
How To Write A Top Ten Doorway Page - An Example