SAPI Questions

I have a few SAPI-related questions I'm hoping someone can help me out with:

1) What version of SSML does SAPI 5.3 support?

2) Does anyone know of any good links for SSML tutorials?

3) Are there any books available for SAPI/SSML (that are relatively current)?

4) Any good reference/tutorial sites for managed (e.g. C#) use of SAPI 5.3 
(e.g. the Microsoft.Speech namespace)?  I've seen the MSDN site for this 
namespace but it doesn't really offer anything useful beyond the names of 
classes and members.

  --- Thanks, Jeff