With Hardy getting a bit long in the tooth so are the versions of software.
Recently a client has tasked me to add varnish to their existing wordpress cluster.
The servers they are using are all Ubuntu Hardy and the version of Varnish in the repos is ancient (1.0.3-2)
It turns out it's not that hard to build a .deb of a more modern version of Varnish.
The following GIST shows the simple steps I used to build a Ubuntu package of Varnish 2.0.6.