Submitted by Virtual Appliances, a maker of nano-sized virtual machines for VMWare, announced their first release last week, an NFS/SMB to web server appliance for VMWare. Their base model is a 15MB download. The appliance is based on Gentoo Linux and is free to use.
You could have an easy to distribute :
. authentication server
. proxy server
. spamfilter
. dns/dhcp
Sort of an ultimate chroot.