Any Suggestions for 'South by Southwest' Panel Idea: "Just Over 50 and not Dead yet"?

I offered to run a Panel at the next South By Southwest titled 'Just Over 50 and not Dead Yet!' (for full disclosure I am one of these over 50). After all a number of the thinking and creative brains working in the web sphere are not 20 or even 30 something. Your suggestions on the topic including speakers would be great. Merci beaucoup!