[…]Having an open source UI will help us […]
So, it’s not Skype being open sourced, but it’s only the UI. The full sentence should be:
Having an open source UI will help us further our [Skype’s] plans to monopolize the Voice Over IP market with a proprietary and secret protocol that nobody can interoperate with. [Evil laugh]
I wish Google released a fully free and open source Gtalk, server included.