What are the current favorite choices for software to facilitate running Virtual Private Servers? I'm talking about products like FreeVSD or Sphera that allow a server to be partitioned into virtual "dedicated servers" that allow each user root access.
I've been thinking about this for a while, and it seems like a nice thing to be able to offer between shared and dedicated hosting. Any experiences with any of the software packages? Any comments or warnings? I looked into Virtuozzo but didn't like their business practices.
