Dunno whether I'll do a talk on track B yet but nevertheless this will surely be the best tech conference ever.
I'll try to do a presentation on why it makes sense to make websites load fast from a business point of view.
Its really cool to be at the awesome SWDC again. I'll talk about why node.js is the best thing since sliced bread.
I think news is out that we'll do it again. More info at JSConf.us.