>So, do they tell you to keep it hush-hush before they show something? Or are most things considered hush-hush?

Not all. As MS has switched mostly from few public Betas to more often public CTPs, this Summit contained surprisingly little in the form of NDA. Most of Orcas (next version of Visual Studio) for example, is public knowledge, so no restrictions there. Craig attended sessions on the future course of VB. Therefore more NDA stuff there until MS sets those changes and ideas in stone, fleshes them out and announces them. I did not attend many VB sessions so I did not get to see that info. I went to the ASP.NET sessions where almost all of what I saw is already public info in one way or another.