Linux and NetBSD Xen VPS hosting.
http://www.prgmr.com/xen/

prgmr.com Xen VPS hosting: Low cost virtual dedicated servers since 2005. Hosting for the technically adept. Linux and NetBSD supported

$8/month for 256mb; $20/month for 1024mb.

Very cheap VS hosting (Xen)

"Webbynode is a hosting solution for developers. Whether it's Rails, Django, LAMP or your choice of Linux Distro, we have a solution for you"

新的hosting介绍。可以试试噢

Since 2005, VMware and Xen have gradually reduced the performance overheads of virtualization, aided by the Moore’s law doubling in transistor count, which inexorably shrinks overheads over time. AMD’s Rapid Virtualization Indexing (RVI – 2007) and Intel’s Extended Page Tables (EPT – 2009) substantially improved performance for a class of recalcitrant workloads by offloading the mapping of machine-level pages to Guest OS “physical” memory pages, from software to silicon. In the case of operations that stress the MMU—like an Apache compile with lots of short lived processes and intensive memory access—performance doubled with RVI/EPT. (Xen showed similar challenges prior to RVI/EPT on compilation benchmarks.)

Remus provides transparent, comprehensive high availability to ordinary virtual machines running on the Xen virtual machine monitor. It does this by maintaining a completely up-to-date copy of a running VM on a backup server, which automatically activates if the primary server fails.

HA solution for Xen

Qubes is an open source operating system designed to provide strong security for desktop computing. Qubes is based on Xen, X Window System, and Linux, and can run most Linux applications and utilize most of the Linux drivers. In the future it might also run Windows apps.

crazy, run each app on the desktop in it's own VM, isolate the networking stack in a VM, etc.

An entirely different approach to security: isolate. A lot. Not sure if this will completely work against common exploits

Die technische Basis dafür liefern bestehende Open-Source-Projekte wie Xen, Linux und das X Window System, die Joanna Rutkowska und ihr Kollege Rafal Wojtczuk unter anderem mit einer sicheren, grafischen Oberfläche versehen haben. Sie soll auch Copy und Paste zwischen den VMs ermöglichen.

自分のところで使うときの参考にしよう．