Quoting from the Nixperience official annoucement:
Nixperience today announced the release of NixVPS, a Virtual Private Server Solution, providing Small Medium Enterprises/Businesses (SME/SMBs) and web host providers alike, the ability to harness the functionality of a dedicated server at a fraction of the cost, and the ability to leverage on a robust and sturdy server virtualization environment for all their business needs.
Utilizing the XEN virtualization system, NixVPS is able to partition a single physical server into many isolated virtual private servers where each virtual private server looks and behaves exactly like a real networked server system, complete with its own configuration files, own versions of system libraries and its own control on users, processes, and file system…