PerfectDisk are running a 25% discount for September on all their titles and bundles.
Go to http://www.raxco.com..._store_small_med.cfm
and during checkout use the coupon code SEPTEMBER25
By the way I have started using PerfectDisk 2008 for VMWare. It is basically the same as the Pro edition (except that the remote defrag option is not present) but you can defrag VMWare disks without running VMWare and defrag the virtual disc file on the physical hard disk. Really useful.