I'm about to go through a new experience with my cousin who is also a software engineer. We have few ideas that we like to turn into software applications.

We are currently collaborating via email to record our ideas and thoughts. But to manage our little project and control source code and track our issues.

Now my question is: How can I make use of the wiki and blog feature so that we don't have to write emails? It is nice to be able to document our work in a formating friendly environment.