The latest round of Porsche 911 spy shots showed the coupe undergoing cold weather testing, and now our frost-bitten shooters have caught the convertible ahead of its reveal later this year. Being a 911, the stylistic changes won't be revolutionary, but we've gotten word from insiders that active aerodynamics are part of the package (think the Ferrari 458 Italia's pliable nose), along with a new speed-deployable rear spoiler and a handful of openings in the bodywork to tweak airflow and cool off components. Underneath the new platform, which insiders hint will carry the 991 designation (we don't get the roll-back either), Porsche's boffins are likely to employ a new electro-hydraulic power steering system to further reduce emissions, with the standard 3.4- and 3.8-liter direct-injected flat-sixes carrying over unchanged. Inside, our spies suggest that the wheelbase may be lengthened to make rear seat accommodations more suitable for fully-formed humans and that Porsche may ditch the traditional hand brake lever in favor of an electronic switch, similar to the Panamera's. We should get our first official eyeful of the next generation 911 later this year, with sales beginning in early 2011.