We have now shipped HPC Pack SP3.
Please take special note of the following from this blog post.
"As part of this release we’ve also updated the preview version of LINQ to HPC, however, this will be the final preview and we do not plan to move forward with a production release. In line with our announcement in October at the PASS conference we will focus our effort on bringing Apache Hadoop to both Windows Server and Windows Azure. Hadoop has emerged as a great platform for analyzing unstructured data or large volumes of data at low cost, which aligns well with Microsoft’s vision for its Information Platform. It also has a vibrant community of users and developers eager to innovate on this platform. Microsoft is keen to not only contribute to this vibrant community, but also help its adoption in the Enterprise. We expect a preview version on Windows Azure available by end of the calendar year."
You can read more about Microsoft's big data strategy and Hadoop here http://microsoft.com/bigdata/
We will be updating our documentation to clearly label LINQ to HPC as a preview only technology as outlined above. On a personal note I'd like to thank all of those who provided us with feedback on LINQ to HPC and helped us develop the product.
Principal Program manager, LINQ to HPC.