Agreed, varnish is awesome, we use it on a home-brew CDN and it has been a fantastic experience so far.
Also, the guy that wrote it (Poul Henning-Kamp) is very responsive when it comes to answering questions or fixing issues, they have an IRC channel at #varnish on irc.linpro.no.
Definitely a piece of software worth looking in to when your website gets bigger.
PHK has a history of smash hits; he is responsible for much of the work on FreeBSD's container-based virtualisation (jails), modular disk device framework (Geom), & disk encryption (gbde).
Also, the guy that wrote it (Poul Henning-Kamp) is very responsive when it comes to answering questions or fixing issues, they have an IRC channel at #varnish on irc.linpro.no.
Definitely a piece of software worth looking in to when your website gets bigger.