London calling. (Photo: flickr.com/anniemole)

Turns out Twitter's mobile ads are more engaging than Facebook's. [VentureBeat]

Amazon is opening a new "digital media development" office in London, which is likely to focus on streaming TV. Naturally, it is located in techie Shoreditch rather than the traditionally bookish environs of Charing Cross. [Telegraph]

The company arrives just in time for the tech talent wars to hit Europe. [TechCrunch]

"One industry party I attended had a jungle theme. This included a real, 600-pound tiger in a cage and a monkey that would pose for Instagram photos." [New York Times]

Lots of users are less than thrilled about Google's acquisition of Sparrow. [GigaOm]

Meanwhile, in cleantech: Researchers at UCLA have developed a transparent solar cell. Dare we dream of window-unit solar panels? [Engadget]