I've noticed a couple surprising blue icons in the new Unity panel.
I think I noticed the envelope glowed blue when I had a new message, and I think the BFB glowed blue when I had a wiggling application, but I can't be sure. I even think the volume indicator glowed blue at some point, but I can't get it to do so again.
I'm sensing there's some subtlety here that I'm missing. Is there a list/explanation?