UnityVS supports Visual Studio 2010, Visual Studio 2012 and Visual Studio 2013. You need to have a fully functional Visual Studio. The minimum SKU UnityVS supports is Visual Studio Professional.
Because Visual Studio Express does not support plugins, you can not use UnityVS with this version.
Microsoft has different programs you can use to gain access to their developer tools. If you're a student, there's a good chance your school has a MSDNAA account you can leverage. If you're a company, Microsoft have programs such as BizSpark and WebsiteSpark for small companies and startups.
UnityVS requires Unity 3.5 or Unity 4 on Windows. UnityVS works with both the Free and the Pro version of Unity.
UnityVS supports C# 3, UnityScript and Boo.
UnityVS comes with a preview of this feature.
UnityVS is currently only available in English.
Yes it is.
There are two different kinds of UnityVS licenses.
All UnityVS licenses come with a one-year subscription to product updates.
You can get a 14 days trial license on http://app.unityvs.com/trial.
We're working on it.