And So I would like it to operate on free google application engine version, I would like it to be pretty much structured like Wordpress (meaning consumer experience). I want clean readable source and so i could change it out as If only.

If you will find no such alike Wordpress ones than another Blog Engine works for me personally.

Do you know the WordPress analogsclones that will run under Google Application Engine?

Roller is a great Java-based blog engine. I am unsure whether it works together with GAE however i can't understand why it can't.