If you've been interested in some of the details of IIS7, the details are now up on the net.
After six hard months of work, the IIS 7 Documentation team has been able to publish the early stages of the IIS 7.0 content to help customers learn the new features.
IIS 7.0 Technical Reference
IIS 7.0 Administration Reference
IIS 7.0 Extensibility SDK
Enjoy!