Microsoft has released a public preview of their new SQL Server code-named 'Denali'

SQL Server code-named 'Denali' helps empowers organizations to be more agile in today’s competitive market. Customers will more efficiently deliver mission-critical solutions through a highly scalable and available platform. Industry-leading tools help developers quickly build innovative applications while data integration and management tools help deliver credible data reliably to the right users and extended managed self-service BI capabilities enable meaningful insights.

With SQL Server code-named 'Denali' customers will benefit from the following added investments:
Enhanced mission-critical platform: A highly available and scalable platform designed to with greater flexibility, lower TCO, ease of use, and the performance required by the most mission-critical applications.
Developer and IT Productivity: New additional tools will help developers build innovative applications with reduced time-to-market while IT professionals benefit from greater operational control and ease of use.
Pervasive Insight: Stunning new managed self-service experiences for end users and holistic data integration and management tools will help deliver consistent, credible data to the right users at the right time.

  Microsoft SQL Server code-named 'Denali' - Community Technology Preview 1 (CTP1)