I'm in the process of converting all locks and intimidate/persuade dialogue options into D20 DC based success/fail (modified by player skill). Before, it required a certain flat amount you had to meet, but with rolls, it offers more freedom. For instance, you can repeatedly try to unlock a door instead of just not meeting the requirement to unlock it.
Since we get very close: If you want to enjoy the advent calendar as it is intended, wait til your date and the day in the URL line up, so you have the final day on actual christmas and not the day before... time zones ;3
I've started the first steps of the final few maps that I need to make for B:ms. I haven't been able to say that in a really, really long time. It'd probably be a good idea to blog about this or something.