Graphic designer Graham Smith has a little ongoing project where he takes famous brands and switches their logo. So for example you get the Coke logo but it says Pepsi. His work include a few video game examples.
Two are Nintendo (one as Sega, another as Sony), one the Xbox 360 (as the PlayStation 3), each swapped out with the font of a rival. It's...unsettling!
Brand Reversions [imjustcreative, via GamOvr]