Microsoft also recently killed off SkypeKit which allowed 3rd party applications to interact (text/voice) with the Skype platform on Windows. They are saying as it wasn't cross platform it wasn't a good solution however it has crippled Trillian (and others) which I used daily for Skype.

Since I find the actual Skype client to be one of the worst pieces of software ever written I've started introducing everyone to GTalk/Hangouts and so far most are changing over.