MyFace

MyFace is a social networking website.

History
After Prankbot 5000 made so his friend could take a picture of him in his underwear started everyone posted to picture on their MyFace's page.

Non-canon
When Lisa read on Bartman's MyFace page that he had changed his status to kidnapped she decided to save him.

Behind the Laughter
MyFace is a real social networking website, though it's usage in The Simpsons is must likely a parody of instead of the actual site.