mc.exe PRODUCTION VERSION 1.01
There is a rewritten & licensed commerial version of this program now available for Windows 8 at www.EmceeSoftware.net.
In addition to the improved features you'd expect in a commercial version -- InstallShield installation, dialog-based settings editor, more customization, including changing the hot key, mouse activation, "spreading out" thumbnails in a pile, etc. -- the big improvement is that the W8 program fully integrates management of desktop windows and management of Windows 8's new "Metro" apps.
EmceeSoftware.net also has a Windows 7 version available for download, and it has the same functionality as the Windows 8 version but without any support for the Windows 8 apps, so not much different than the version here.
The software on EmceeSoftware.net can be downloaded with a free two-week trial license if you want to take a look at it.
We're trying to figure out how, and when, to make the commercial version open source.