Thanks for everyone's interest in M2M2! Let me try to get to everyone's questions...
M2M2 is now closed source
Well, not all of it. The core will mostly be closed except for the module packages and selected areas which will allow others to write modules. Some modules will be open source to act as examples of how to write other modules. And module writers can choose if they want their code to be open or not.
M2M2 no longer needs Tomcat or Apache
Yes. M2M2 uses the embedded Jetty server, which provides a lot more programmatic flexibility, and one less installation step.
M2M2 will probably support some new, cool stuff so people want to upgrade (since open source version sounds A LOT better)
That's what our marketing department strongly advises. Also, it's a fair bit of work to maintain two systems. So, we only plan to update M2M with requests from customers that need to remain on M2M for the time being.
What will be the future of Mango M2M?
Eventually it will be retired. No idea how long this might take.
When M2M2 is expected to be production ready?
Is it guaranteed that M2M2 core will remain free (as-in beer)?
Sorry, but the core is the one thing pretty much guaranteed to not be free.
Regarding "open source", considering the fact that the number of people that contributed anything back to the project is less that 0.1% of the number of users, i'm assuming that this attribute is not really the main concern. (For those who customized their instances without contributing back, please note that the modularization in M2M2 is intended to still allow this, and in fact make it much easier. And you can also sell your modules!)
Most likely it is the not-free-as-in-beer issue that worries most. As Arne said, the bread that our developers (and their kids) eat is not free either. Charging a bit of money covers the multitude of costs that arise with developing and marketing a product like Mango.
And when we say "bit", we mean it. We expect the price for the core to be < $100 CAD. Modules will probably mostly be free, but even those that aren't will likely be in $20 CAD range. I sincerely hope this is not a problem for folks. For any users who are NPOs or charitable organizations or such, please contact us and we may be able to provide discounts.