and of course Cory Doctorow in an Information Week article:
Columnist Cory Doctorow describes how Facebook and other social networks have built-in self-destructs: They make it easy for you to be found by the people you’re looking to avoid.
It may not happen today, it may not happen tomorrow, but inevitably Facebook will experience a great big sucking sound as everyone moves on to the next big thing, it happened to AOL, Tribes, Friendster, and even to Myspace. The point is yes develop strategies and tools for leveraging Facebook, but as the old saying goes "don’t put all your eggs in one basket", and don’t stop scanning the horizon for new and interesting ways to connect and more importantly empower your customers.
This was a brief Public Service Announcement from Karl Long who writes about new strategy at ExperienceCurve.com, good luck Rohit