Read it in full here.

List of key changes:

Interactive SDK

1. Data set ratings and view counts
2. End user comments, feedback, requests.
3. Recently published, top rated, and most viewed data sets  featured on the data catalog page.
4. Extensive data set filtering on the data catalog page.
5. Interactive query builder.
6. Ability to quickly and easily change the logo, most of the copy, and footer links through configuration.
7. Announcements and news feed on the landing page.
8. Chart and bar views over data.
9. Integration with browser history and deep bookmarking.
10. New, better factored code base using ASP.NET MVC.
11. Provider model for data access, enabling clean retargeting to alternative data storage systems, e.g. SQL Azure, SQL Server, etc.

Data loading

1. Better throughput (our informal testing shows close to order of magnitude improvement on a two core machine).
2. Ability to add data to an existing data set.
3. Ability to update entities in an existing data set.
4. “Log exception and continue” error handling.
5. New data loader Windows application enabling interactive metadata entry and data set loading.

Please help us to improve OGDI further by voting for and adding feature requests and bug reports on CodePlex.