Ask HN: What to do after graduation with 100k?

I'm a regular reader and commenter, but for this question wished to remain anonymous. I apologize about the length of this, you can skip to the end for the question if you are short on time, but would really be grateful for any responses as I really value the HN community. Background: I'm 21 and currently approaching the final year of my undergraduate degree at the University of Virginia. I'm a business major at the McIntire school which is fairly respected (http://www.businessweek.com/bschools/rankings/index.html) and concentrating in management with a sort of sub-track in a newly launched entrepreneurship program that I'm excited about (co-taught by some entrepreneur alumni). The business program is a two year program and I came out of high school with enough college credits that I've been able to take more or less any classes I've been interested in (mostly Philosophy, Political theory, Psychology.. I seem to like the P's). I absolutely love the college academic environment as I lov