Watir-Webdriver: How to run headless, and in grid

I'm upgrading my script from Watir to Watir-Webdriver and I'm wondering how to take advantage of headless-browser testing and grid testing. I've done some research into it but my sources don't seem substantiat开发者_如何学Pythoned, and tutorials are very thin on the ground right now, so has anyone done headless browsing or grid testing? How did you achieve it, and what did you learn that you wish you knew when you started?

I'm working on XP and MS Server '03 VM machines. If I make progress on this I'll try to keep the question updated with information.

I have written a post about how to run Watir-WebDriver heads headlessly using real web browsers in the cloud using Amazon EC2.

See: http://watirmelon.com/2011/08/29/running-your-watir-webdriver-tests-in-the-cloud-for-free/

Have a look at Watir grid https://github.com/90kts/watirgrid might be what you are after.