Want to check out the clustering changes in Windows 2008 but dont have a SAN, servers, and a lot of time?  No problem, the folks at Microsoft have got you covered.  They are providing a virtual lab for you to play with all this until your heart is contented.

http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?EventID=1032345932&EventCategory=3&culture=en-US&CountryCode=US

Title

TechNet Virtual Lab: Windows Server 2008 Enterprise Failover Clustering Lab

Overview

For the exercises in this lab, you will be responsible for the configuration of Windows Server 2008 Enterprise failover clustering for your organization. This lab will teach you how to add nodes to the cluster and configure the cluster to support a variety of high-availability roles such as file, print, and DHCP server clusters.