Drive Bender is a storage pool application that kind of acts like a RAID. Unlike RAID, you can use mismatched drive sizes to create a single large virtual volume. Storage Spaces in Windows 8 / Server 2012 have a lot of performance related issues (read: 20-30MB/s writes) so until they sort themselves out, this appears to be the best program to do basically the same thing. Could be useful for those that have spare Windows XP / Vista / 7 keys around for their servers to add the storage pooling technology to their servers and desktop PC's.
I've posted the deal here because there is a substantial discount on the licence for the full "Windows" version - and there's a lot of N40L's being purchased.
Limited to 100 keys, not sure how many are left.
Update: Another 50 keys have been added (from Twitter).
Good deal but probably a lot more support for unraid. Unraid is free for 3 drives.