Doesn't really sound very appealing. Mikkeller do something similar on a much bigger scale, so if you feel like a poop beer that might be easier to find.
Mikkeller's is called Beer Geek Brunch Weasel and it is made with coffee beans that are eaten by and crapped out of a civetcats. Never had it myself of course but here is a pic...
Holy crap! :-D I do like some ideas of Mikkeler, never heard of this one though. Might try it sometime...maybe...if I can get rid of the rather shitty idea.