Do you have a week's worth of vacation days and a place to stay in NYC? Seth Godin is offering a week-long, alternative M.B.A. for free to folks who work for social benefit organizations. He doesn't explicitly include librarians, but I think the case wouldn't be too hard to make. Of course, free is relative in this case; you still have to pay for your own transportation and lodging. And Seth promises lots of hard work and studying.