In addition to bug fixes and updates required to run correctly on VS 2008, several new features have been added:
A new downloader in the MSBuild projects that makes it easy to download any missing redist files that have a Homesite link. This will work especially well for people who have downloaded the Visual Studio Express products.
(New since the Beta) The new downloader is also capable of handling .NET Frameworks 3.5 and .NET Frameworks 3.5 SP1, extracting the downloaded files and updating the product.xml for the SP1 package according to the Visual Studio 2008 SP1 readme.
When a package is selected in MSBuild projects, dependent and included packages are selected or deselected automatically, making it easier to build a complete and optimized bootstrapper.