Andy Inhatko has noticed that the iPad keyboard dock mostly works with an iPhone 3GS running iOS 4. You can write emails, notes and anything you want with it. There are some considerations to make though.

“The iPhone 3GS’s rounded base has a tendency to wiggle up from the dock, causing Unexpected Things to sometimes happen. Sometimes I’d experience “stuck” keys. I also suspect that another potential Unexpected Thing might be that your iPhone’s dock connector could get cracked if you keep trying to scrunch it in there.

This is only a practical solution to the problem someone betting you $10 that it can’t be done. The iPad Keyboard Dock isn’t even a practical travel dock for the iPad, for God’s sake. If you want to use a physical keyboard with the iPhone, just get a Bluetooth one. Apple’s Wireless keyboard is slim, trim, affordable, and it works great. Other Bluetooth keyboards are even smaller.”

So there you have it. If you have an iPad keyboard dock and happen to have  an iOS 4-enabled iPhone 3GS, give it a try. Otherwise, just take a look at the video embedded below.