Better buy one fast. How long do you figure until Amazon hits him with a cease and desist? It's fun and I really want one and would hope amazon would have a sense of humor about it, but he has to be infringing on all sorts of trademarks... not to mention now he's making money off it.
I don't know what the ramifications of large-scale production would be, but parody has a long-standing exemption. If it had any kind of functionality, instead of being just a piece of plywood, he'd be wide open, but I think (although IANAL) that he's in the clear with them.