It's the end of the world as we know it...

I really don't think that there is much or a danger of skype disappearing - it's too valuable. Worst case scenario is that it reverts back to it's previous owners and/or continue under a different name.

But, realistically, I doubt that anything will change. EBay has deep pockets, and I'm sure that they won't give this up easily. I doubt that they would license a technology, and then lose the license without a fight. Ebay does not like egg on its face.