Well Documented Open Source Business Case?
PeteQC asks: "I'm currently working on a project and I need solid and well documented case studies about actual implementation of open source in an enterprise (failure or success). My goal is to use the grounded theory to build a scientific model on Open Source adoption. I've searched through the web, but the only good case I found was the Beaumont Hospital Case. (Which was also published in IEEE Software, January/February edition). I'd like to know if Slashdot knows of other well-documented case studies which I may use? I'm looking for a link to a web site or a reference to a specialized publication, but all assistance will be welcomed."
The PostgreSQL advocacy site has some case studies about its adoption. Most of them are pretty terse, but the PDF ones are more in-depth.