Linux Cooperating with Windows???

Here's an interesting story I'll have to check out in more detail myself. It seems coLinux allows you to run unmodified Linux distributions in a Windows environment, all while Windows is running without resorting to a commercial virtualization product like Microsoft Virtual PC or VMware Workstation. This sounds like a great way to try out various flavors of Linux without committing your system or working in the temporary environment created by the (very useful) Live CDs.