I get a fresh news in this morning, Microsoft will be launch XNA 4.0 in this year, rumor says it will be relased in (or after) Fall 2010, however, XNA 3.x will be released in few weeks. For now, Microsoft still not announced it officially and the information about XNA 4.0 is still very little.
Some opinions says that XNA 4.0 will be compatible with .NET 4.0, and of course Visual Studio 2010. What i really expect is… will XNA 4.0 have features for Project Natal? I hope so… :)