I wrote this little guide that tells you how to do some basic stuff on minecraft Pi edition, such as invisible doors. It also includes some more advanced stuff for those of you who want more- changing multiplayer 'StevePi' username, ETC. The link takes you to a page at the raspberrypi.org forums. You can also submit your stuff as described on one of the last pages. Here is the link:
ADDITIONAL INFO: As well as the RPi and Minecraft forums, you can contact me through my element14 account (no spam please). If you have any MCPI questions, visit this link: