Hello V8 - Websphere not having vendor IP is news to me.
OGDI isnt about open source purity (no such thing anyway, really - is Intel's chip code open source?), its about providing an affordable, modifiable solution thats ready to go out of the box. We also hope the community will find it useful and contribute
enhancements to it via codeplex submissions.
Its being on Azure is more about how you pay for it (because any solution requires money at some point). So you either have to buy your own hardware (and possibly software) and maintain it etc., or you host it somewhere, and that isnt free either.
This is a solution that we hope will be, at a minimum, attractive to people with .NET skills, but we also have a PHP port in the works (also running in Azure)
So what you are asking is really has anyone done this on another platform, and I'd say I'm not aware of anything but there certainly could be.