Try Out SQL Server 2008 the Easy Way! by Gus Collazo
I ran across a very cool site today that is hosting virtual sessions of SQL Server 2008. You create an account there and then get a remote desktop connection to a machine with the latest beta copy of SQL Server 2008 already installed. Best of all, any work you do in the session will be persisted so you can setup a new database, test some of the new features of SQL Server 2008, log off, and come back later and continue working.
When you visit the site and sign up, you will not get immediate access to the free SQL Server 2008 beta account. Instead, information on accessing the account is emailed to you within 24 hours of registering for the account. Once you get the email, it will contain the login information you need to run Remote Desktop Connection and connect to your new instance of Windows 2008 with SQL Server 2008 (CTP6).
It's all here at SQL Server Beta.