For accessories, I went with the exact following:
Neoprene zipper-less wrap around sleeve
So far, I only have the screen protector. Tracking shows the TPU shell to arrive on Tuesday, and the sleeve will probably come next week.
Was going for simple, ease of use/transport, and nothing too professional looking (like a folio case). This is supposed to be my leisure toy, so these accessories are supposed to accent my lifestyle intention for it :)
Non-folio case? This is your best choice: http://www.amazon.com/Exact-Design-Google-Android-Tablet/dp/B008LJKTGC/ref=sr_1_1?ie=UTF8&qid=1358266431&sr=8-1&keywords=nexus+7+tpu
It's a generic "X" pattern case that is cheap, light, has good grip, and feels great. Got the same case for my HP Touchpad and Kindle Fire, and will keep buying them.