Comment 4 for bug 191378

apt-cacher and apt-cacher-ng are both pretty aggressively maintained. The version of apt-cacher that will be in jaunty has sprouted several new dependencies, though, as well as new features.

I have some experience with squid, too.

+1 from me on having Ubuntu recommend a specific apt-caching solution. I'm kind of indifferent as to which package is used, or if there's just a guide for squid config.