A year and a half ago, Microsoft released the source code for the .Net Framework BCL for debugging purposes. This incredibly useful offering has had a tremendous impact on my debugging experience.
It was mentioned that they were working integrating the source release into their build process, but this appears to have fallen through.
The latest releases of the .Net Framework assemblies (including patches and hotfixes) do not have source available at all.
What can we do to convince Microsoft to maintain this excellent offering, especially for the upcoming release of .Net 4.0?