XNA 4.0 for xbox question (confused)

At the moment I have visual studio 2010 open, I see XNA Game Studio 4.0 and then I see Xbox 360 Game 4.0 as well as window game (4.0) I was under the assumption that these were not released yet, or not ready.

1. What h开发者_Python百科appens when I actually use them? am I using XNA 4.0?
2. can I publish to Indie games for xbox(pretty sure I cannot) using XNA 4.0,
3. can I copy the code and use it with 3.1?
4. will I be able to use my code for when they do release xna 4.0 for xbox/window game/anything other than windows phone 7?
5. If I am actually using XNA 4.0 what are the new features? and if there aren't any, what makes this different from XNA 3.1 (other than the phone stuff)

sorry for all the questions just slightly confused

1. What happens when I actually use them? am I using XNA 4.0?

   Yes, you are using 4.0 (the beta, unless you are using the older CTP)

2. can I publish to Indie games for xbox(pretty sure I cannot)

   The beta does not support deployment and testing on the Xbox. I assume this means no publishing to Indie Games.

3. using XNA 4.0, can I copy the code and use it with 3.1?

   No, there are a number of breaking changes in 4.0.

4. will I be able to use my code for when they do release xna 4.0 for xbox/window game/anything other than windows phone 7?

   Yes, the beta can be used with WP7 and Windows, the release will also support Xbox 360.

5. If I am actually using XNA 4.0 what are the new features? and if there aren't any, what makes this different from XNA 3.1 (other than the phone stuff)

   There's been a lot of optimizations and improvements to the API. IMO, the best source to get a grip on all the goodness (and the breaking changes) is Shawn Hargreaves blog.

These questions can be answered here