Q u o t e: FYI, we’re getting very close to starting the closed public beta test for Diablo III. You might start seeing some new reports about the beta client as we’ve begun limited external testing with employees and their families, and there is no non-disclosure agreement (NDA) for that. We look forward to sharing more info about the beta test in the near future. Stay tuned.
If you have a beta license, you are free to show, share, or talk about any portion of the beta content to which you have access, as this beta test is not confidential.
This was pretty much expected. Cause it'd be impossible for Blizzard to stop people posting beta videos on youtube, blogging about it, talking about it, etc etc. Much easier to have no NDA for the beta then waste company resources trying to police an NDA.