* Warren Buffett, CEO of Berkshire Hathaway, told CNBC that his company spent about $10.7 billion this year to buy 64 million IBM (IBM) shares, acquiring a bold 5.5% stake in the company. (Fortune)

* Author Salman Rushdie raised a ruckus on Twitter yesterday after Facebook deactivated his account, then later reinstated it with the name used on his passport instead. The kerfuffle emphasized a continuing problem surrounding online identities. The New York Times explores who whose business is it — and why? (The New York Times)

* Several notable employees and board members have recently left Twitter. Here’s a tally. (Fortune)

* Have we moved beyond focusing purely on technical specifications now that we have devices like the MacBook Air or Kindle Fire? That’s what TechCrunch columnist MG Siegler argues. (TechCrunch)

* Apple’s iTunes Match service, which basically scans users iTunes libraries and matches them to the music available on the iTunes store, went live yesterday. (The Loop)

* Ilya Zhitomirskiy, one of the four co-founders of the social network Diaspora, committed suicide over the weekend at the age of 22. (CNNMoney)

* Tech blog The Verge may have gotten its hands on a photo of the first BlackBerry with the new upcoming operating system, BBX. (The Verge)

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