Why Invest in Social Features for Your Web Site?

UIE Brain Sparks » Blog Archive » Why Invest in Social Features for Your Web Site? This is a great article by Joshua Porter. Funny thing that just struck me: Isn't this exactly what David Siegel said would happen back in 1997 when he wrote "Futurize your Enterprise" (and Seth Godin in "Permission Marketing")? Pretty smart guys - those two. Only thing is: How much is media hype and how much actually converts to revenue? (And how do you measure the amount attributed to social features? But then again: how do you measure the effect of billboard marketing - what without considering general ecomic factors as unemployment rate etc?)