- execs are not supported
- static pulls are not supported
- auto_push is not supported
Moreover the code is now much more portable so it can probably compile on uncommon platforms not supported earlier.
UPD: Nginx for Windows compilation guide
Add RTMP module with the usual option --add=module=PATH/TO/nginx-rtmp-module
UPD2: You can use Microsoft Visual C++ 2010 Express to compile nginx. It's free. Download it from Microsoft web site.