Nobody needs to be reminded that Facebook is the flavour of the month. You probably know they refused bids of close to a billion dollars from Yahoo and Viacom. And that they were started in a Harvard Dormitories (who says business schools don't produce great businesses!). They're currently growing 3 times as fast as MySpace (remember - last years social networking phenomenon? It's so 2006, dah-ling!) And more interesting details in this article in the Time Magazine.
In my view Facebook has a few pieces of the puzzle absolutely spot on. First, by restricting the usage for the first couple of years, they've built up a core of loyal users and created a culture of actually connecting with real friends, instead of random strangers who might become friends in a disembodied sort of way. Second, by opening up the platform and allowing people to write simple apps, they've tapped into a huge well of creative and technical resources which has propelled new ideas, apps and usage. Third, by enabling simple, and apparently trivial capabilities like "Poke" - they've hit a very important vein of social networking - a need to connect. Personally, it's a meaningless, but somehow an intimate act that you would do only if you knew a person.
Actually my personal experiences on Facebook have been very rewarding. For example I haven't met Avinash for 6 years or more, although I always liked him when we worked in the same office way back when. Now, I'm playing scrabble with him - we haven't yet caught up and exchanged news, updates or swapped life-stories, but through the ludic experience of scrabble, it's a comfortable re-entry into each other's universe. I occasionally poke Amit, who now teaches at the Indian School of Business at Hyderabad, but with who I spent many of my college afternoons. Or although one doesn't get to meet one's friends sometimes for months and years, its nice to know what they're up to on an almost daily or hourly basis. S has workers in her house, J is attending an event in a bar this weekend, my cousin is bored, R is reading the book I just finished... it's the little things with the important people, and not the other way around, as some social networks seem to push you into. (sharing important things with inconsequential people).