I tried running apt-cacher but I can't get it to work at all. Whenever I try to update another machine, it stalls and apt-cacher requires a restart. I am now trying out some new tips from this page:
Especially this one:
in the apt conf file.
UPDATE November 20, 2007: I'm no longer using apt-cacher. Instead I'm using squid or caching apache web server proxy, depending on the setup.