The good thing about Scrum in 2008 is that we do not need to proof anymore that Scrum works. There are thousands of people using Scrum and hundreds of companies using Scrum.
Mark Levision has done a create job by pulling Scrum Case Studies together.
It is striking that the people ask for case studies about agile – but didn’t before adopting their existing process. — Mark Levsion.
Go and have a look!