Markl's Thoughts: Don Box and HailStorm
I never had a good sense of what Microsoft's Hailstorm was, except for the central role for identity management. Here a former Hailstorm developer describes it from an engineering perspective. Stripped of all the Microsoft marketing gibberish it sounds like it was quite interesting. Alas, it also sounds anathema to Microsoft's business model, which is entirely based on controlling key data structures.