The C# team is working on a parallel version of LINQ, PLinq. LINQ is a new feature in the next version of C# that promises to integrate data query right into the heart of the language. I think this is one of the most exciting developments in the evolution of programming languages today. MSDN has a great LINQ Project site.

For those who are interested to learn the inside story of LINQ, take a look at Daigo's website (Japanese).