Tim, as the title of this section says, it is for discussion.
WHAT do you want to discuss?
What you wrote is informative and interesting, but it clutters the site and takes away attention from REAL issues.
he meant to post the following link, with regard to the profile mentioned (on the right). By mistake he put it in the subject line, where links don't work (or left it blank). These Public Discussions are for WHATEVER topics Geni users choose to talk about. Tagging profiles as he did, is certainly one of the INTENDED usages.