MobiFrance points us to this intriguing company: http://olo-computer.com/. It looks like they're intending on developing a low-cost sort of Netbook, but with a difference -- it will be powered by the iPhone. The idea is you plug your iPhone into the bottom and it not only becomes the touchpad for the Netbook, it also powers the thing entirely, the rest of the hardware is simply a keyboard, screen, and a few other bits to make it all run.
It's an idea that's already been done with Windows Mobile in the form of the Redfly.
Of course, based on the rendering above, which pretty much just looks like a shiny-ified MacBook, the idea is very far from being implemented. It also would almost certainly not work on a non-jailbroken iPhone, either. With Apple set to announce (possibly inexpensive) new notebooks next week, it's also difficult to say whether or not the olo concept will even find a market. All in all, there are a lot of cards stacked up against this thing.
The Redfly is certainly intriguing and useful for a set of people -- would you want to see the same sort of thing applied to the iPhone?