We've featured pen spinning before on Neatorama, but this activity is virtually a popular sport in Asia. There's even a club of pen spinners [warning: self-starting audio] in Thailand made up of (all young males, as far as I can tell) pen spinning enthusiasts.
Urlesque blog has a selection of some of the neatest pen spinning tricks ever posted to YouTube. And to think that all I can do to my pen now is chew its end! Link