We are happy to announce the official support to Windows 8 and Windows Phone 8 starting from version 1.4 of the C# API we published today. The new API allows to build native applications and games for the two operating system (including Metro-style under Windows 8) and can also be used in Unity to publish 3D games targeted at those platforms. Get the new API on this page and the examples package here.
And speaking of updates, we also release a couple of minor versions of the HTML5 API and Objective-C API, available on the same page linked above. And inside the SFS2X doc site a vastly improved Java client API javadoc is now available.