Why b2evolution, blogger/blogspot, and quam plures? Where's WordPress?

Now you asked two questions at the same time. To answer your first question, Quam Plures; Blogspot/Blogger; and b2evolution were chosen because these are the platforms that JC John Sese Cuneta uses or used. He is very much familiar with these platforms and he particularly supports Quam Plures and b2evolution for a self-hosted blog platform solution.

For your second question, Paninap Themes as of this question (2010-07-09) will not create or import themes, skin, layout, and templates for WordPress. First of all, there are plenty already available out there to the point of making the space or market saturated. Secondly, the three chosen platforms, specially Quam Plures and b2evolution, have a superior and easy to use template and skin system - not to mention the blog platform itself.