We do have a web page in the works where you can download updated documents.  I don't have a timetable of when that will be launched, but it should be soon.

The last API can be downloaded here: http://download.sonymediasoftware.com/dev/ Note that the namespace has changed from Sony.Vegas to Scripting.Vegas

I'm guessing that the latest API is from 2010?

Probably something like that.  I haven't checked, but when I started looking over everything as we rebranded the applications, those documents were quite horribly out of date.  For the most part, the API has remained the same outside of the namespace change.  A few minor things have changed.  The FAQ document needed some fixing up as it was written back in Windows XP days.  I will endevour to keep these documents as up to date as possible in the future.  

Probably something like that.  I haven't checked, but when I started looking over everything as we rebranded the applications, those documents were quite horribly out of date.  For the most part, the API has remained the same outside of the namespace change.  A few minor things have changed.  The FAQ document needed some fixing up as it was written back in Windows XP days.  I will endevour to keep these documents as up to date as possible in the future.  

Thanks!  I've recently started working with code that automates a lot of video rendering, so it's nice to have an outlet for questions.