some other example code I started playing with to prep concurrency section.
some other example code I started playing with to prep concurrency section.

pnkfelix/presentations,pnkfelix/presentations,pnkfelix/paris-meetup-presentations,pnkfelix/paris-meetup-presentations,pnkfelix/present-rust-codemesh2013,pnkfelix/presentations,pnkfelix/present-rust-codemesh2013