So, I am killing some time and I went to Dick's Sporting Goods. I noticed on the shelf the 1lb propane Coleman canisters with a "green key":
http://www.coleman.com/coleman/recycle/cylinder_dis.asp
Looks like an easy way to de-pressurize and recycle the propane tanks (other than refilling them via the adapter tools)
http://www.coleman.com/coleman/colem...ategoryid=2010
Wonder if they'll make a similar, easy to use tool for the Lind valve type fuel containers?