I only have a PS3 and two PS3 controllers, so storing or charging the controllers isn’t really a problem. But if you have a PS3 and an Xbox 360, you might want to get the Power Pyramid Supreme by Konnet.
It’s compatible with both PS3 and Xbox 360 controllers, and can charge up to 4 controllers at the same time – two PS3 and two Xbox 360 controllers.
You can order the Power Pyramid Supreme at Konnet for $55 (USD). If you only own a PS3, you’d be better off getting the Power Pyramid. It’s a bit cheaper at $50, and even though it doesn’t have a “Supreme” in its name, it can charge up to 4 PS3 controllers simultaneously. There’s no Xbox 360-only version, probably because the controller is too fat that fitting in four of it in the same design would be impossible.
*Edit: Ooops. As the great monster Ragnogroth pointed out in the comments, there is an Xbox 360-only Power Pyramid, and it looks awesome in black.*
[via Chip Chick]