NDA is lifted has been for a week or so. They are encouraging sharing screenshots, videoes etc.
The NDA that was lifted was for the "weekend" beta/stress testers.
There is still an NDA on the full-time beta testers and they have only been allowed to talk about a few area's while others are still under NDA (like the high level content, etc).
However that NDA is supposed to be going away this friday so the full time testers can talk about high level content.