Conditional http get for dynamic pages

[David Dick]

G'day all,
This is slightly off topic, but i figure there is some interest in web 
stuff in the perl-mongers.  I've been reading the http rfc over the last 
week and realising just how cool conditional gets are for dynamic pages. 
 It seems to reduce network traffic by a good amount.  Is anyone else 
using them for dynamic pages?  Any experiences on this?
Uru
-dave