This is a really great idea. I hope you take some pics and add some info or some articles, so we can see how that can be done.
Is there some irony in you comment?
There are others already using at the bicycle, e.g. http://blogs.thehumanjourney.net/finds/entry/20080306
There are some additional features I would like to have, which I will describe on my user page until it is worth to make a separate wiki page.