An interesting post from Craig Berntson, Microsoft to clamp down on MVP bloggers? http://www.craigberntson.com/blog/2007/03/microsoft-to-clamp-down-on-mvp-bloggers.asp

There he says : "As an MVP, I was required to sign a non-disclosure agreement (NDA) and can't talk about many things Microsoft tells me. If an MVP breaks that NDA, then he should be dropped from the program."

What does this "NDA" consist of ?