There are a lot of choices out there when you want to use a web application instead of emails to discuss a project. Our favorite full feature app is Basecamp but it maybe too complicated for some users and it’s limited to one project for free accounts.
A more simpler solution might be to use a new web app called Brizzly which was designed to be simple and easy to set up.
It shows the whole discussion on a single web page. If you hate tracking down the latest message thread in your email box, something like Brizzly could work well for you. I took a quick look at it over at my other site StartupInsider.net. Read the mini review…
I don’t understand why don’t you guys look at the P2 theme by WordPress?