This has already been turned into a personal vehicle some years ago. It won the 1988 Toyota Olympic Ideas competition and ran on perpetually spinning Chinese woks. The best link I can find is

http://books.google.com/books?id=1M3e82yGmZMC&pg=PA27&lpg=PA27#v=onepage&q&f=false

Perhaps someone can find a better picture or video.

I had an idea for a duplicitous encryption scheme. Not sure if it's already been done.

It's very simple: you can use one of two keys A and B. If you use key A, then you get the plain-text you wish to keep private. If key B is used, then you get some diversionary data (something innocuous, but for which encryption is plausible). The encrypted files would be larger, but the scheme could be made so that you would never know if there are two sets of data or only one.

Thus if you encounter nosey border guards, you type in key B and show them your soft-core pron collection ("I didn't want the wife to see it, Officer...")