In other news, I hacked my Microwave by entering a duration and pressing start.

In the 1980s some Caltech students hacked the Rose Bowl stadium scoreboard so it showed "Caltech 38 - MIT 9" (typical Tech rivalry). That was more fun :-D

http://today.caltech.edu/today/story-display?story_id=11464

And in 2006 someone hacked the displays in Toronto commuter trains to show "Stephen Harper eats babies."

http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20060502...

Interesting, but I was hoping to get more information on the actual internals of the signs rather than just an overview of the normal controller.

I agree. A more appropriate title for this article: "A script kiddies guide to cracking programmable road signs"

What are they called now?

Although I don't think its safe at all, I think this is awesome.

Awesome, yes, but I'm not really sure I'd consider this "hacking." We're about to have thousands of 13-year-olds running around changing road signs to references to bodily functions.

Ah, to be 13 again.