This was a gift from Storm (of Paul and Storm fame) for my 40th birthday.
It's a custom made American White Oak barrel, suitable for aging spirits or beer or ... something less interesting.
I put 3 gallons of porter in there about 8 weeks ago, and I've just left it alone while it sort of cask conditions. It tastes pretty good, if a little oaky (duh), but the oak flavour has mellowed over time. I'm not sure how the final beer will taste, but I'm looking forward to putting a barleywine in it sometime next month.