Nov 1st 2007 SAN FRANCISCO From The Economist print edition

COULD Facebook, a three-year-old social network and the hottest internet company of the year, soon be as passé as AOL? AOL, you will recall, was a popular but proprietary online service of the early 1990s. But then Netscape’s browser made the web easily and widely available, and today AOL is a lumbering unit of a media conglomerate. Another such “Netscape moment” may just have occurred in online social networks.