Oh Stef has voiced his opinion on it before this in a few videos. Nothing substantial however. I don't suspect it was necessarily a procrastination on his part.
The first time Stefan mentioned Bitcoin was at 40:15 here:http://www.youtube.com/watch?v=x36kWkB1CD0
He mentioned it in a little more depth in the middle of one of his long shows within the last two weeks, but sorry I'm not going to watch through them all again to find the reference.
And he has just released this one:
Stefan Molyneux on TV: Bitcoins: digital currency of the future?http://www.youtube.com/watch?v=pcchQs2YDZ0
It looks like Stefan has become a convert:
It's a very powerful system, and it's a really ingenious system. It's a beautiful thing that has been created in my opinion. I think it's just wonderful!