A deal advertised on the "Mac OS Ken" podcast website. I could not find any expiry date, but the coupon code seems to work today (11/02/2012).
Deal was advertised here: http://www.macosken.com/index.html
VMWare Fusion allows you to run other operating systems from your Mac OS X. It can also boot a physical BootCamp Windows partition within a virtual machine, without screwing up your installation.
Parallels is similar software, but is more expensive. VirtualBox is a free alternative, but does not offer all of the features of the other two (e.g. BootCamp booting in a VM).
My first bargain. Burn away.
First post, nice find, but 10% isn't really a bargain.