Full details of whats included can be found at the download page, but interesting things include:
- Full support for all the C# 3.0 features,
- Cross framework web development support (target .Net 2.0, 3.0 or 3.5 in your web dev)
- WPF Designer
- Click once for Office Applications
- Peer networking class API's in the CLR
- and lots more...
Go get it 🙂