Portable Rocket Stove for cooking

Sorry if this has been posted already, mods please jam it in with another thread if it fits there.

We're going to be camping this year so I've been looking for gear and people keep mentioning a cook stove set up. This isn't something I've been thinking about since we eat a pretty raw vegetarian diet but we do cook eggs now and then and like hot water for tea and washing. In the interest of DIY I've been googling and came across this which I just think is brilliant.

http://robnoxious.wordpress.com/2008/08/14/diy-rocket-stoves/

I have a big empty can in the basement already, it's coated on the inside with some plasticy thing, probably BPA so I guess I'd have to burn that off outside or something first. I'd just make the most basic of heater things with this idea but someone here will probably take it and make something fantastic.

Here are some more links to similar cook stove things. I don't think this would work inside but cooking outside, even just on the deck, is totally doable for a big chunk of the year and there are always tons of branches on the ground everywhere we go.

http://www.winterlakeresearchcenter.org/midge.htm ; lama poo *snort!*

http://www.wa6otp.com/Stoves.htm

I have been using rocket cook stoves for a long time (similar to the ones in the first link).  They need to be taller for better results, but they will work (and smoke) without being taller... Taller is better for cleaner burn.