Sandcastle:

[url]http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=517576&SiteID=1[/url]

Sandcastle is the product used internally by Microsoft to build the documentation for the .NET Framework.  This is very exciting to me as I'll no longer need to decide, for example, when to use b tags instead of see cref's when writing documentation (unless this is done by Microsoft as well, in which case they're INSANELY consistent).  But it's also exciting that we don't need to rely on a third-party tool to make something that almost mimics MSDN.  Don't get me wrong - NDoc was great - but some places just didn't quite fit the bill.

I'm hoping they'll let the community provide some measure of extensibility.  All told, Microsoft has been great at doing so with the .NET Framework.  I hope the program manager in charge isn't a dumbass.

That's awesome.

Sandcastle CTP Has officially arrived.