Just interested to hear about how people plan on toting the 12" rMB around with them, especially given how portable it will be. It doesn't make sense to carry it in a heavy backpack! I've been wanting to get a day bag for the past year or so, so I think I'm going to do that. I've been looking at a few bags. I've just been using my rMBP in the laptop sleeve of my travel backpack. I've seen that there a few sleeves/cases already up for pre-order from various places, which is pretty cool.