http://www.garden-helper.com/Articles/Make-Your-Own-Rooting-Hormone.asp very interesting. i suspect im going to try it, there is a willio tree right down the road from my house.
At the greenhouse I use to work at we just put small twigs in a small coffee grinder, shredded, and let them soak in a 5 gallon bucket for awhile until we needed it. Then we would make a new batch when we were through with it. No hot water need. Works great!