Let me just point you to Justin Reich's post on The MTT2K Prize he and I are co-sponsoring and co-judging. I only want to add a +1 and maybe a smiley face next to this sentence:
As far as I'm concerned, MTT2K has brought all kinds of good to the world.
I'd like to see some more of the kind of engagement we saw this last week, the kind where online criticism turns into improved outcomes for millions of students in the span of 24 hours. I'm excited to see what comes of this.