Easy now german my brother. The beer over there is good but not great the micro scene here is one that is almost untouchable. Having lived in germany for two years I wont say that american beer is king of all but I tell you what till you have gotten neck deep into the west coast micro brew scene you aint seen beer.
Anyways, this idea has been around for a while. Like my german friend, I have never tried it.
I here its not bad but I dont mind just carrying the real stuff with me and for the fifty bucks they charge you for the set up I can make a hell of a lot of beer via all grain.
or just buy a good bottle of whiskey.
over all I think that it is a good idea but I am not sure that is goign to really save any weight from say my can of fine micro brew.
cheers,