Varnish + Joomla

[kevin]

Hello,

I was curious if anyone out there has used varnish and joomla together
(successfully). I would love to see a working configuration of varnish 2.1
(or even 3.0) with Joomla. I am particularly interested in how to deal with
the PHPSESSID session cookie that is created (by joomla) for every single
visitor, logged in or not. 

I have played around with vcl_hash among other things , but my hit rates
aren't that good and I would love to see another working config, or if
anyone who knows joomla & varnish could at least give me some pointers.

Thanks in advance,

Kevin