First came the PowerLogix Aluminum PowerCube, available in 3 powder coat finishes.
http://www.cubeowner.com/forums//index.php?showtopic=3863
The limited-edition Aluminum PowerCube has been replaced by the Clear Acrylic PowerCube, which has a smaller footprint, while retaining the benefits of the original PowerCube. The Clear PowerCube is currently available for only $129 (regular retail price is $139). Lots of buzz in the CubeOwner Forums about it!
Feature List:
Flame polished cast acrylic
G5-style aluminum top plate
Substantial additional cooling capability for higher performance upgrades
DC/DC Card relocation mounting bracket and cable (note: cable measures approx 5 1/2 inches)
Greatly increased free area around video card for maximum cooling
Works with original Airport Card
Acrylic PowerCube Install Video*.
Aluminum PowerCube Install Video*.
[* subject to revision without notice. Check PowerLogix.com for updated documentation. Some documents are posted here for historical reference only and may not be relevant to currently shipping products.]