ibook, Macbook power adapter tip/hack

I can't decide if this is a good tip or not. Basically, you can sub in a PlayStation 2 power cord for the little nub on an iBook or older MacBook power supply:

Ninety-five percent of the time, I'm satisfied with leaving my larger cord at my desk and taking the little plug-nubbin on the road with me (the thing on the bottom, below):

But I guess if you need another 5' of range and want to a) leave your longer cord at home and b) be able to plug in to older outlets at long range (ones without a ground prong, which the Apple extension requires), then this is the hack for you.

The downside? Your adapter ends up looking like something that a guy with a Linux laptop would use. You know the kind of guy I'm talking about. (But that hasn't stopped me from throwing my old PS1 adapter in my bag, just in case....)