Fortune’s curated selection of tech stories from the weekend. Sign up to get the round-up delivered to you each and every day.
* Instagram reported that it now has 27 million registered users.“It’s Facebook-level engagement that we’re seeing,” co-founder Kevin Systrom said at South by Southwest over the weekend. Also, the long-awaited Android version is coming very soon. According to Systrom, it will be better in some ways than the current iPhone version. (Mashable)
* Mega investor Peter Thiel is going back to Stanford University, his alma mater, to teach. This spring, Thiel will teach a course named “Computer Science 183: Startup.” (Reuters)
* Why ex- Google executive Adam Bosworth’s startup, Keas, has the potential to make people healthier. (Really.) (Fortune)
* The competition has shifted from companies competing with Facebook to companies competing on it. (The Wall Street Journal)
* Small video games have another problem to deal with besides getting noticed: having their ideas shamelessly cloned. (The New York Times)
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