I have heard about Ciechan, but it is nowhere to be found in the US. I have heard only good things about it and the next time I am in Poland I need to get some! I heard there was a great bar in Old Town Kraków that has it. It came recommended to me from a friend in Kraków.
Haha, I know exactly which one he means. Next time you are in Kraków, send me PM, I will take you there. Really glorious place, little bit pricey, but truly best beer you will ever drink, with decent selection of rare and excellent beers, as well as some kinds of mead (if you would want this specifically, I know another excellent place not far away that specialises in them ). Obviously, both are medieval-themed.