Nice start.
I'd like to see one showing off how the bot will automatically start the builds once you push, so, maybe start off with xchat conencted to the channel, terminal to update an existing application, push the change. Then show the bot notification on the IRC channel. Also show them the a tour of the web UI... the slaves page shows the status of each slave and if you click on each slave, you can see which apps it is currently building and the last 10 builds for that slave.
BTW: On the `commit` command, the "-a" is for "add the changes of the modified files to your commit" and the "-m" is for "message"