<p>What VM technologies exist for Linux, their pros and cons, and which is recommended for which application?</p>

<p>Since this kind of question can be asked for X other than "VM technologies for Linux", and since the answer changes with progress, I suggest to define a template for this kind of pages.  Those pages will have the tag 'stateoftheart' and they will be revisited each month and each month there will be up-to-date list of technologies, up-to-date reviews and up-to-date recommendations.</p>

2008 Oct
To be filled in at October to reflect the market status then.
2008 Sept
Products/services/technologies currently existing
VMware
Xen
VirtualBox
VServer
???
Comparisons
???
Recommendations for particular application areas
Home multi-boot replacement
Small business which has MS-Windows legacy applications
Datacenter of multinational corporation
???