Hi Damon,
Personally, I think that it should either be a link to the business directory as you said, or it should just be taken off, one or the other. I'd lean towards a link to the business directory.
I'm not 100% sure where I stand as to making it compulsary to add a link to your website. Problem with this, is that it's not easily enforceable. I would probably have an easily recognisable notice either displayed all the time on the business directory tab or when trying to submit a link, clearly stating that you would love the favour to be returned with a link back to GDF, possibly with example code below for lazy people to copy in. I wouldn't use large text or anything like that, but make sure it's slightly seperate from the rest and stands out to the eye.
It might be worth putting a post in 'important announcements' telling people not to post up a link in the directory's yet, although, just checking the forums there isn't such a forum yet. Your thoughts on including that forum?
:icon_biggrin: