JT - You miss my point - of course there are a million experts on this site -but they are NOT all experts on one specific subject. Perhaps EXPERT is the wrong designation - what I meant is that there are many various posters who are knowledgeable in ONE or more specific areas - not necessarily generalists.
I know when people email me, they do so about particular information - and I looked for people with particular information that I needed. Not everyone knows everything about everything.
I envisioned a list of subject matter with names of those interested in adding their names to the subject matter to be contacted as needed.