Reporting safe arrival of 2.6/16/768 from early 13/6 order, to NZ.
It's lovely. Exactly as I expected. The screen is fantastic. This whole it's-awful-when-web-pages-and-apps-aren't-retina-enabled is just twaddle, sorry. The non-retina parts are fine (as good as they would usually be). The retina parts are superb, at least as good as the ipad3 if not better. And, of course, everything is going to get better as apps and websites catch up.
All the resolutions are great. Running in 2880x1800 is quite doable on your lap (only problem is that it isn't retina!). Otherwise 1920x1200 is fine for most things.
All I'm struggling with is OSX, as this is all new to me coming from PC-land. One quick question for the experts... is there any way of inverting the mouse/trackpad scroll direction? I have a bluetooth mouse and both it and the trackpad scroll in the opposite direction to the one I'm used to and that feels more natural. I can see options for changing the scroll speed but not for inverting the direction...