As Ken pointed out, Windows Server codenamed "Longhorn" Beta 3 is now available for download from the Microsoft website. As part of this beta release, Microsoft has made available a Go-Live license for IIS7/Longhorn Beta 3.

On the www.iis.net website, you can work your way through the "6 Easy Steps to Go Live with IIS 7 today".

Here's a few useful FAQ's from the IIS.NET website I though might be helpful as well.