This week in cleantech: Google Ventures, Q3 and the share economy

What happened this week in cleantech on GigaOM Pro, our premium research service? — The opportunities and risks in the share economy, the third quarter dreary cleantech figures, Google Ventures explains why it backed Nest, and Calxeda forecasts its next low power chip.

New York rising: Brooklyn gets its first VC fund

Charlie O’Donnell, a principal at First Round Capital in New York, thinks Brooklyn is increasingly where the action is, and he’s launching the first Brooklyn-based venture capital fund to help kick-start companies on the other side of the East River.

WeatherBill morphs brand to focus on climate

Startup WeatherBill has built a business around offering farmers financial protection against weather, but the underlying goal of the company has always been to help companies adapt to a changing climate, the company’s CEO and Co-Founder David Friedberg told me.

Xobni Co-Founder Returns With Postagram

Xobni co-founder Matt Brezina is back in the startup game with the launch of Sincerely, aimed at making it easy to print photos taken with mobile phones. Postagram, Sincerely’s first product, prints and sends postcards made from Instagram photos for 99 cents.