If you're looking at utilizing high performance computing in your environment, then take this opportunity to kick the tyres with Windows HPC Server 2008 (HPCS).
Windows HPC Server 2008 combines the power of the Windows Server platform with rich, out-of-the-box functionality to help improve the productivity and reduce the complexity of your HPC environment. So, here's a way to efficiently scale to thousands of processing cores and provides a comprehensive set of deployment, administration, and monitoring tools that are easy to deploy, manage, and integrate with your existing infrastructure.
When you download the 180-day trial software, you're also automatically registered to receive valuable resources delivered at convenient intervals throughout the software evaluation period.
Also, check out this whitepaper, Windows HPC Server 2008 Technical Overview, to get a basic understanding of what Windows HPC Server 2008 brings to the table and what the benefits are for you!!!