Randy,
Please, if you can coordinate and coerce the current OACS users into writing a case story, please!
I might mention that Danielle Hickie had a similar idea, but it never really materialized. And that GP has had plans to write up such a biz case about their web site for a long long time, but that hasn't happened yet, either.
Expect people to be busy. You may want to offer to do an interview by email or phone (or http://www.skype.com), then write up a draft for them.
Or we could try to coerce Reuven Lerner to write them up. At least he knows how to write 😉
/Lars