If you want to play with the examples, go to CEAN and download "Erlang/OTP Full (Standard)" at the bottom for you version of Mac OS X and follow the "How do I install CEAN to /usr/local/bin" FAQ entry. Alternatively, if you want to wait longer, you could use MacPorts to download and compile it. Once you've got that set up just run erl from the examples directory in the slides download and it should all work.
