Hello everyone,
I have created a pre-installed virtual machine of Calculate Linux in VirtualBox 3.0 and it appears to work well.
For those that are interested, you may download the VDI for FREE via torrent.
http://virtualboximages.com/Calculate-Linux-9.7-kde
At the time of this writing I am uploading an OVF VMDK version also.
There are many more FREE pre-installed virtual images available in both native VirtualBox format and OVF VMDK format
http://VirtualBoxImages.com
Thank you
-James