Laptop OS Virtualization?

[Ted Roche]

Has anyone got multiple OSes running simultaneously on their personal  
machines? I've got a laptop I dual-boot between WinXPPro (client  
work) and Linux (more client work, home & hobby), and I'd like to be  
able to toggle between the two rather than a slow reboot.

Anyone doing this? What VM manager are you using? What host OS? Tips?  
Reviews? Pans? Warnings?

Ted "You've got answers? I've got questions!" Roche
Ted Roche & Associates, LLC
http://www.tedroche.com