One thing Facebook, Twitter etc have done is to make it even more important to appear to lead an interesting life than actually leading one.
Applies to entrepreneurship, patriotism, concern-for-causes too - ?
Everyone's marketing - their lives, lifestyles, their relationships, their heartfelt causes, and of course (and maybe most appropriately) their businesses :) Its reverse-voyeurism, in a sense. And surely, our social networks can be for so much more, can they not ?