Self-portrait explosion: NY Times
"Here I Am Taking My Own Picture"
Art historians say that the popularity of the self-portrait is unprecedented in the century-long history of the snapshot. "I think it is probably a new genre of photography," said Guy Stricherz, the author of "Americans in Kodachrome, 1945-65"
Another fabulous outcome of the digital photography revolution.

It's an interesting topic, and the TIMES article only covered one aspect of it. For a different perspective, check out the website for the open collaborative project called Self Portrait Tuesday:
http://selfportraittuesday.blogspot.com/