Hey, I love "me too"s, they are all interesting projects. That's a very novel way of managing packages, does it work if you copy all the symlinks out and then restore them (so you can back up/restore your installed packages)?
It's simply a view "remote" APT repositories, not your local package setup.
That's a really cool utility - can it be used with a caching proxy to reduce network traffic?
Yes, assuming that caching proxy is an regular APT proxy.