OT but sorta related. Hikin_Jim's post and blog articles on butane adapters, and refilling canisters with butane made me take a look at the stoves designed for that can. The stoves available on Amazon and REI mostly look the same, one burner, can sits in the compartment on the right-hand side. Mostly good reviews.
Not exactly designed with backpacking in mind, but it might make for a great emergency stove. Relatively inexpensive and fuel cheap enough that HJ finds ways to use it in stoves not designed for the cans.