Parallels publishes the fourth beta of its upcoming hypervisor dubbed Parallels Server.
The new beta re-introduces support for Mac OS X 10.5 Server as guest OS.
The product is now in beta since almost one year (the company demonstrated the first private beta at Apple WWDC event in June 2007) but Parallels is working on it since much more: in January 2006 SWsoft (the company former name) was talking about a Parallels Server and a Parallels Enterprise Server planned for early 2007.
Hopefully the only product survived from that original plan will be released at the upcoming WWDC, set for this June 9-13.
Enroll for the beta program here.