Over the weekend I drank two different stouts with the first being Hoppin' Frog Barrel Aged Boris. This was aged in bourbon barrels for a few months. Not sure exactly how long, but I feel like it's got to be at least four months based on the strength of the flavors. I easily could be wrong though.
Firestone Walker Parabola though that one was slightly more complex. Definitely one to pick up if you see it and don't mind spending a little bit for it.