Those of you familiar with the Nissan Leaf will know about its Carwings system, which lets you check the vehicle's charge, turn on the AC, rate your driving efficiency against others and even read RSS feeds out loud -- all over an always-on cellular data connection. In fact, the RSS functionality raised some privacy concerns when it was discovered that Carwings embeds location and other data in the URL it sends to public servers (something that can thankfully be disabled by the owner). Nissan announced today that it plans to make telemetry data from the Leaf available to third-party developers for a fee -- with the owner's consent, of course. The company already uses telemetry data for vehicle maintenance and products like Carwings, but it hopes to broaden the ecosystem with apps. Examples include smart-grid integration (supplying power to a building for a reduced parking fee) and location-based services (real-time coupons as you drive by restaurants). It'll be interesting to see if there's enough interest from both developers and Leaf owners for Nissan to successfully monetize this idea.