Boris Adryan has worked out a way to program Minecraft via the visual programming environment NodeRED. It's essentially a Python interpreter that waits for messages from NodeRED and then transfers them to Minecraft Pi Edition via the API. Read how he does it here.
Here's a tutorial written by Liam Fraser of Linux User and Developer magazine. It teaches you how to set-up a Pi with a wifi dongle (that has access point abilities) so that it acts as a wireless access point. Very useful for when you're programming a robot, for example, or for more pedestrian uses such as a public access point for your home network. Read more here