It's meta day here at ESUG - we have a panel on Meta Modeling now with Lukas Renggli & Mathieu van Echtelt & Adrian Kuhn & Tijs van der Storm. They are trying to cover:

• A Comparison of the systems (the ones they all work on)
• Roundtrip engineering
• Collection Hierarchy?
• Versioning
• Broader Context than "business" relationships
• Portability, Interoperability vs. Productivity, Reuse
• User Interface rendering, naked objects
• Persistence
• Simplicity

Code generation (Lukas doesn't do it in Magritte) is getting a lot of talk here. Again, I'm getting a video of the entire talk, so you should be able to see the whole thing fairly soon.

The topic of code generation - good or bad - seems to be generating a lot of discussion with the audience.