I've got a hypothetical question for everyone.
You own a website with established content. Lets call it 'Golf Info' for now and lets say its domain is 'golfinfo.tld'
Now. You want to add a forum however you already own the domain 'golfforums.tld'
A) Add your forum to 'golfinfo.tld/forums' - taking advantage of the existing site visitors to help boost the forum's initial activity
B) Run the forums on 'golfboards.tld' in the hope that you'll get more type-in traffic and keep it all seperate (whilst still linking to it from 'golfinfo.tld'.
Which option would you pick, and why?