I like mixing drinks, despite having no real skill for it. The commercial bar-tending courses seem to rely extensively on flashcards for the learning of drink recipes, so I though a UNIX fortune file of drink recipes would be a natural fit for learning.
Unfortunately, I couldn't find any good, public drink listings in a format I could parse. Eventually I found one in CVS from this project: http://drinkmixer.sourceforge.net/ It's not huge, but at least its a start and easily added to.