A few days ago I discovered it while on the interwebs. I did some reading. It seems to me like 90% of it is taken up by the French military, and the remaining 10% is the nude village. The village only has like 200 people in it; so it's very small. The economy seems to be mostly based on tourism. There are several hotels on the island, though there is no running water and the accommodations seem pretty sparse.
Nudity is forbidden in the military zone (obviously), the port, and the public buildings (church, post office, town hall); everything else is clothing-optional except for the beach where nudity is mandatory.
I've never been, it's across an ocean from me. I did look it up and saw that I could get a roundtrip ticket for less than $800; so I could easily finance a trip with my summer earnings; if I could get my parents off my back.