caching guidance

[Daniel Chaffee]

Per our working group discussion related to caching - 

http://code.google.com/speed/page-speed/docs/caching.html

the only proxy they mention actually is "Squid up through version 3.0" but do say "Most proxies" in there as well as it relates to not caching ? resources.

It's a fairly short easy read and I thought it was interesting.