Konnet PS3 and Xbox 360 Power Pyramid
Konnet makes a few versions of its Power Pyramid charging docks, including one that's designed to charge four wireless Xbox 360 controllers at one time and one that charges four PS3 controllers (which only come in a wireless version). However, the model we reviewed is the only one that charges both wireless Xbox 360 and PS3 controllers. That duality obviously has some appeal to gamers who own both systems and don't want to invest in two charging systems.
Wireless Xbox 360 and PS3 controllers can be charged via USB, but a dedicated charger such the Power Pyramid eliminates cable clutter (there's only a single AC adapter) and lets you charge controllers without having the respective game consoles turned on. Like many other charging stations, what's nice about the Power Pyramid is that it also doubles as a storage stand for your controllers.