This man has travelled for 10 years by road bike, carrying just a backpack (I do believe he rode Madone's for most of it coincidentally). http://en.wikipedia.org/wiki/Okhwan_Yoon
He was documented in the YouTube film "Life in a Day", starting at 28:33 http://www.youtube.com/watch?v=JaFVr...-button&wide=1

I don't claim to be as experienced or motivated as this man, but I do think it's a pretty inspiring feat. It's a pretty cool example of how little you need to actually pack to get by.