Upgrading thousands of boxes via APT

[Ben <mack.stout@gmail.com>]

Hi List,

I was wondering if there's a Debian specific tool that could facilitate 
managing thousands of machines via APT. I'm aware that many people would 
recommend a sync option, where 1 machine serves as the master, and the 
others sync off of that. Perhaps that is the only reliable approach, but 
I thought I'd just check in w/ the list and see what people recommend.

Thanks,
Ben