As Skype CEO, Jonathan Christensen, promised last year, this world's most popular communication service is now available for developers as a "pure" service. Yesterday SkypeKit SDK was released. It allows any software and device to use the Skype network for instant messaging, status control, audio and video chat without the need to install the proprietary client. SkypeKit supports Windows, Linux and Mac. It includes the Skype's "VoIP heart" - Silk codec, which was opened for developers a year ago. However, the bad news is that SkypeKit can't be used by web-applications and mobile applications.