If you wanted to run with the FB idea you could even have special privileges for the "confirmed user" for certain parts of their own bio page. If I don't know you and go to your page I see a wiki bio and whatever anyone has added. If we're wiki-friends I see all that plus your anything in your wikifriends area (pictures, whatever).
My theory on getting rid of notability is you'd have say Z million people come and make webpages for themselves and their friends and family. They'd learn the edit tools and process. And so you'd get an organic growth effect in both natural users and editors.
And of course the big incentive is that we're cutting good editors in on some adsense sharing, idk base it on some function of how substantive an edit is, how long it lasts and how popular the page is.