Automatic deployment and maintenance

[Sebastien JUST <sebastien@seij.net>]

Hello

I'm looking for software that could help me deploying, and keep track of 
installed software on my machines. We have more 10 Debian servers and 40 
end-user machines.

I dream of a software solution like this :
- web based,
- that could keep track of installed Debian machines,
- that owns its own repositories ( depending on groups of machines, say 
Office, Server, Development, Advanced Users... )
- that can update its own repositories depending on available upgrades 
on Debian Mirrors
- that can push updates to installed machines,
- keep track of OS versions, and packages diff
- manually push specific debian packages on machines, and ask machines 
for updates
- show diffs between local installed packages and repositories

Somewhere, it's a server-side Synaptic, like RedHat Network, but for Debian.

Does something like this exists ? Does someone's interested in this so 
we could eventually collaborate on this ?

Sébastien