Large container for liquids - beer barrels hold 32 liters but could we have something like a massive vat 6h 4 x 4w that is somewhat metalish with a small window to show how full it is and a means to check the contents. (this would be an ideal thing to slap a label on)
Labels - something like a portrait you can place on barrels or wherever that will show the label of what is stored there (you could also include normal item images for much the same effect)
Electronic Beer Barrel - allows you to see what stage your fermentation is in without removing the fermenting beer from it.
Fun recipe for boozeption - rum is a good start but what about other things like maybe apple cider perhaps or something original with its own unique effects.
Beer Barrels - alternative textures, label of what is in it as a tooltip
Canning Machine - Put Beer, Ale, Dragonblood barrel into the top slot and empty cells into the bottom to create beer cans.
Some method of chilling the beverage to buff or reduce negative effects of the canned drink.
Terraforming - a way to actually alter the biome you're in to become a new biome instead of merely simulating the effects of one (it would show up as X biome in Rei's minimap for instance) You could mark out a perimeter line of effect and set it up similar to how the buildcraft landmark torches do. It doesn't need to be quick to achieve its overall intended effect and could need massive energy to pull it off I don't mind if its hard to do just that it can be done would be nice especially for the agriculture being able to make zones of swampland would be useful or areas with snowfall or even just some fun places that have a lot of weird biome combinations.