Yeah, I've tried some organic beers in the states and they're really good! I went to a tasting for Peak brewing company, and let me tell you, their Espresso Amber Ale is intense

It's dark and slightly bitter, and it contains real coffee, so it gives you a kick. It's one of the better coffee-beers I've had.
Organic hops are pretty hard to come by though as far as I know, so organic brews are pretty expensive unfortunately.
I've brewed my own beer before, and it came out pretty good (brown ale - Newcastle style), but I'm pretty sure it wasn't organic. The packages that the ingredients came in surely had some kind of preservatives.