The Dudes' Brewing here in Torrance use Georgia pecans in their Grandma's Pecan English-style Brown Ale (it's pretty damn good and chock full of pecans). They are an up and coming brewery here in SoCal that just started canning recently. Here is a one-minute video they have posted on their web site showing how they make it. Pretty neat. I've had Rogue's Hazelnut Brown Nectar, too, that jesskidden mentioned earlier. It's a really great beer (FWIW, I don't like many other offerings from Rogue). Definitely no lack of hazelnut flavor in that one. I know this thread started because the OP is allergic to nuts, but these two beers are really great and make me want to seek out more nut brown ales, a style I have (until recently) been overlooking.