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 Some info in the article appears to a bit outdated
http://wiki.xensource.com/xenwiki/XenDomUSupport Guest Operating system support chat for XEN
http://openvswitch.org/ right now ppl are using linux bridges as virtual switches for XEN/KVM VMs. Open vSwitch is an improvement over linux bridge that supports industry standard protocol and features and IOS-like CLI – [when project matures] ]you should be able trunk your VM server with cisco switch and expand it into the server with all features supported and backed by a standard config.
http://zumastor.org/man/ddsnap.8.html a way to ‘sync’ block devices in ‘rsync’ style. Useful to implement backup of xen VMs based on LVM volumes. Also see http://serverfault.com/questions/27397/sync-lvm-snapshots-to-backup-server
http://www.opennet.ru/openforum/vsluhforumID3/65661.html#23 Notes (exert) from Joanna Rutkowska recent paper comparing KVN and XEN architectures from security and design standpoint
http://lists.xensource.com/archives/html/xen-devel/2009-03/msg00530.html note from redhat engineer explaining what version of xen is used in RHEL 5.x (this is not that simple, hence this post)
http://karesansui-project.info/wiki/karesansui/En_tutorial web management for XEN, including installing, monitoring and console. Based on libvirt, written in python, ,uses JQuery for interface, tightvnc-java for console, SQLite [default], MySQL, PostgreSQL as database.
http://lwn.net/Articles/321702/ Message to Kernel Mailing List about differences between XEN and KVM .
http://conshell.net/wiki/index.php/Xen_Hosting_Providers list of hosting providers that host XEN (PV) images. /some host custom images/
http://ovirt.org/ new project from redhat to provide management console for XEN, KVM [and everything that can be managed via libvirt]