nickmitch, are you from Louisiana or do you just happen to know Creole for some inexplicable other reason?
I am from Louisiana, and decided rather arbitrarily to take French in high school. Minored in college, have a pretty firm grasp of the language, though I don't get near enough practice. May go teach in France for a while, to hone up. My understanding of Cajun/Creole French is limited, but I can generally read it and make sense of it. Hearing it is another matter.
That's the only language aside from English that I know really well, but I can pick up on Spanish and Italian thanks to my knowledge of French and linguistics in general (my friend is studying as a linguist, so one picks things up). That friend and I may actually be learning Finnish for the hell of it soon, but I don't know how serious that will get.
If I had to choose another language to learn, it would probably be Russian, Japanese, or one of the Chinese dialects. I've also seriously considered learning Greek, since my family (mother's side) is from Greece.