Yeah J is fun.  If Python is the least weird, J is maybe the most weird language I know ("know").

J is one of those languages that rewards cleverness -- the kind of cleverness that leaves other coders in the dust sometimes (or oneself, when feeling less inspired).

I've got some writings on it linked from my CP4E page:  http://www.4dsolutions.net/ocn/cp4e.html

Kirby