I hope to see that the emerging TalkBoard - whomever it is - represents the diverse backgrounds we have on FlyerTalk. There are people from all walks of life - all financial background, ethic & religious backgrounds, sexual orientation backgrounds, and educational backgrounds to name a few. We all have one thing in common though - a desire to be a member of FlyerTalk and a desire to discuss travel related topics. The future TalkBoard should represent all of these travelers.
Now, to answer the question that wasn't asked, as Mary2e pointed out (and opus17, I don't forget that 2 is a prime number also!) - I don't think there should be any sort of mandatory requirements. Whoever is best suited for the open positions should be filling the open positions.