Comment 5 for bug 1314465

We discussed this topic at the 32nd dev meeting. The consensus was to proceed with Gregor's patch because it's an easy, harmless way to at least make custom sideblocks possible. And in the longer term, we'll consider making them into a full-featured plugin type.

So, I've spun off a separate Launchpad bug for that: https://bugs.launchpad.net/mahara/+bug/1315205