Hi,
a Czech company running vCloud has a nice webpage with little schema of
hw architecture which changes if you click on a hw item making it as
failed, then it shows redundant paths to continue funcionality.
It also has nice feature (even old) comparison between
VMWare/Hyper-V/Xen/KVM.
Check 2/3 part of
http://www.master.cz/cloud-hosting/
Something like this was be niiiice for oVirt.
jbelka