I carry a MYOG paint tin version of the Bush Buddy for cooking on the trail. After being worried about fuel on a particularly wet walk, I carry a Trangia burner filled with metho to drop in the stove, same as Jeff above. The only addition I've made is that as my stove is a bit deeper than the real BB, I cut the bottom off an aluminium can, and use this upside down as a stand inside the stove. This raises the burner to a useful level.
On the campfire side of things, a few friend and I are getting together to see how big we can take the BB concept. The aim is make our way up to a cut-down 20L (5 Gallon?) paint can as the outside shell, with a 4L can as the fire bowl. If this works, the grand plan is to make a giant one out of a 44 gallon drum, i think we'll call it the hobo inferno.