I built one for my dad for Fathers Day this past year, yeah I know best son ever. I have to tell you, though, I'm jealous he gets to use it every weekend and I have to suffer with my Weber Smokey Mountain . But seriously I need to source some food grade barrels here in Dallas so I can build me a couple of my own.
Primary - JAOM, and JABOM (B=blood)
Secondary - En Primeur Pinot noir
secondary - empty :(
bottled - T'ej, Apricot dessert wine, skeeter pee
misc - long term storage of Kombucha SCOBY's and water kefir grains; Sauerkraut and Kimchi on deck