Has Object Prevalance (Prevayler, Madeleine) been used in a Production System?

Question

Has Object Prevalance mechanisms been used in an actual Production system? I'm referring to something like Prevayler or Madeleine

The only thing I've found is Instiki, a wiki engine. But since they started they've switched to SQLite. (The actual instiki page is down)

Answer 1

Well, we're using Prevayler in a project that's aiming towards production by sometime next year, but we're not close enough to give any real scouting report. We think it's going to work...