One Pot Application

I don't know what OPA is, but I think that building an application on top of Gemstone/S and Seaside (GLASS), or their upcoming Maglev product and Rails would be a "one pot application".

I've been a Rails developer for years, and just recently started using Seaside to build an application and I used a basic object database for it. Eventually I'll port it to GLASS, but either way the lack of plumbing has been refreshing. So "OPA" isn't a new idea and there are existing technologies out there for it already, AFAIK.