[Facebook in 2010: no longer a walled garden – O'Reilly Radar](http://radar.oreilly.com/2009/03/facebook-in-2010-no-longer-a-walled-garden.html)
Is Facebook set to open up over the next year?
[Facebook blinks, copies Twitter, still gets it wrong. – broadstuff](http://broadstuff.com/archives/1596-Facebook-blinks,-copies-Twitter,-still-gets-it-wrong..html)
Is the aggregation of activity model in danger of breaking?
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