Jack, I think most folks are more likely to click the Home Page Fish-In link. From there they are offered a direct link to the BB post about that paticular Fish In.
I know that at a few of the Fish-Ins there are a core of folks that make it every year, anything beyond that is a highlite!
As far as having a section on the BB about the FI's, I feel thats great. And as far as a quick post to remind folks about a upcoming event I do think a post on the main or sound off sections works well!