Hi Cynthia -
Just bouncing around the concept and looking for some clarification on how the fee would potentially work... Would the fee be required to access the forum at all (as in to just read postings)?, or would the fee be required only of those who want to actively participate/post?
Fee to be able to read?
On the one hand, it'd be nice to know that my clients couldn't stumble upon some ignorant

sounding question I may have posted (who me?)! On the other hand, if I hadn't been able to browse around a bit before jumping in, I wouldn't have known just how amazing this site is! How would potential new members know what was here?
Fee only to be able to post?
Would some be more inclined to only read rather than actively participate?
Just curious about what you're envisioning... and how it might affect the dynamics of the forum community? I do see this forum as a valuable resource and don't think it's unreasonable that you consider charging a fee.