Ela sent me to:
http://www.trifl.org/cedar.html
 
Very interesting, and what's very funny about it is that Jeff is a friend,
but we lost touch when we had an uproar here with my Step-Mom's aorta
separating and some address changes, and he had an address change.  Kind of
a two-in-one; get to learn something and read a lost friend's work.  Neat!
[Posted in FML issue 2849]