updating the Help / Introduction section

Hello,

Little by little, I'll be updating and improving the whole introductionnary section here:
http://www.wechange.org/introduction/

Today, I wrote a first draft of a new page to introduce the Projects at wechange and how they work:
http://www.wechange.org/introduction/wechange_projects
You can post a reply to tell me what is not clear, what information should be added, or wording improved.

thanks.

A.