First hands-on reviews out at
Engadget (the most comprehensive IMO),
Cnet,
Gizmodo,
Crunch Gear
Nothing really new. Everything seems to work fine, with very few problems. That's good news considering Nook the e-reader at lauch date. RAM is at 512MB and pinch-to-zoom is only for home-screens and magazines, not the browser or e-books.