I was at the local Lowes Store today to purchase an Oxygen tank to aerate wort. They had the little red tanks for about eight bucks, and then I noticed that they had a kit that contains one oxygen tank, one mapp gas tank, a regulator for the oxygen tank, and a regulator for the mapp gas tank. The tanks feed each into a handheld torch gizzie (technical talk). The kit was priced at $18.99. Pretty good deal if you're thinking of using o2 for boosting your wort.
I hooked up the O2 tank (which is left hand thread) and then slid a 1/4" vinyl hose over the torch gizzie, dropped a small aeration stone from Petco into todays brew, and let the oxygen run for about a minute or so. I had to use a rubber band on the end of a racking cane to get the air stone to the bottom.
I took a photo, but I'm not sure it will post.... here goes...
Oxygen Clearance - HomeBrewTalk Gallery