I like the pepsi can stoves if I am traveling alone especially if I won't be doing any elaborate cooking. I would rather use my Pocket Rocket if there are more people and/or I will be doing more elaborate cooking. The only problem we had with the Pocket Rocket was availability of fuel in Kansas and Missouri.

Pepsi can stove:
http://www.pcthiker.com/pages/gear/pepsistove.shtml

Pocket Rocket:
http://www.msrcorp.com/stoves/pocket_rocket.asp