There is a new version of XNA Studio Express available. XNA Game Studio 2.0 (Beta) also comes with a bunch of new resources. There are several new sample projects for this beta.

There are a number of new features in this edition. One of the most exciting is networking support. With version 2.0 games can communicate between two Xbox 360s, between two PCs and between a PC and an Xbox 360. You can learn more  about the requirements for using the networking support at the official announcement at the XNA Team Blog.

The turn around time between this beta and the final release should be short BTW. You may want to use this version to try things out and see how it works but hold off full scale installations in labs until later. Or not. It depends on how adventurous you are.