http://share.skype.com/sites/linux/2009/11/skype_open_source.html
Not open source in my book. They are only open sourcing the UI/Client, the protocol remains closed...
Yes, there's an open source version of Linux client being developed. This will be a part of larger offering, but we can't tell you much more about that right now. Having an open source UI will help us get adopted in the "multicultural" land of Linux distributions, as well as on other platforms and will speed up further development. We will update you once more details are available.
Not open source in my book. They are only open sourcing the UI/Client, the protocol remains closed...