Sören Bleikertz - On Amazon EC2's Underlying Architecture

http://openfoo.org/blog/amazon_ec2_underlying_architecture.html

Some description of EC2 Internals. EC2s are XEN VMs, mine is currently using Xen 3.0.3-rc5-8.1.14.f , which appears to be F14 Xen package re-build on RHEl5.x (this is by looking at compiler version) . Some info in the article appears to a bit outdated