Ooh, I seem to be able to join in this discussion early. I hadn't been able to read what had been previewed before so I had ignored this thread. Being able to join in the fun early made me feel like registering - so, first post!
Firstly, on typos and such, I haven't spotted anything beyond what's been reported so far (here or on the comments on the Tor site).
I don't have time for much in the way of comments since I need some sleep (1.30 am local time). Just some quick random thoughts: starting each chapter with a death is rather interesting, particularly with the curiously precise time to death. Brandon seems to like main female characters who also blush a lot - doesn't feel odd for Shallan considering her background (ditto Siri) but felt a bit out of character for Vin. Looks like Shallan's sketches will be pad out the book a bit - sweet idea, and doesn't seem forced. I have this vague feeling that spren might be a bit like the mist from Mistborn (ie semi-intelligent distributed part of a god-like being), and that maybe we shouldn't necessarily assume that how the people of the world categorise them are how we should ultimately categorise them.
Overall pacing felt a bit like start of Warbreaker, but more intense and greater sense of depth.