Actually, we will be supporting this community project. We don't just send an invite and then disappear.

We have various things that are being worked on right now to help the community such as defining license terms in a way that the community can build and use variants. We also made much more components open source than ever previously in order to support this activity. There might be still components that the project need in order to succeed and we will try to make them available too. What we can't do within the next months is put lots of people working on the kernel and lower layers to make the backport. That is too complex to be feasible without delaying the work on the lead device. But even that we don't want to influence the ongoing work for the lead device of Maemo 5, we did get help from the core development team to make this pre-alpha SDK happen. In this case, it was a fix needed to run the Maemo 4 UI on top of Maemo 5 software stack. Small but valuable things.