Open source messaging and collaboration server

One of my development goals this year is to begin and maintain an open source messaging and collaboration server. Think an open source version of Exchange. I plan to provide a client sort of like Outlook as well.

There are a couple Exchange alternatives out there, but hey why not reinvent the wheel. Why? Because I can.

My goal will be to build a cross-platform server and client with a very small set of dependencies. Right now without doing to much design the dependency list is:
QT
ACE
PostGRES

I'll keep this blog updated on my progress and once I have a page setup I'll post it.