It looks like people have just substituted it for honey or some other type of highly fermentable sugar in various recipes. I just bought some yesterday. I want to incorporate it in some kind of gluten free recipe for my wife.
Have at it, and good luck! Let us know how it turns out!
Just do a google search for "homebrewtalk agave beer"... that's how I found out what people were doing with it.
"Behold the rain which descends from heaven upon our vineyards, there it enters the roots of the vines, to be changed into wine, a constant proof that God loves us, and loves to see us happy." - Ben Franklin 1779