Sure, but I was under the impression that there's a lot to the N900's UI and default applications that we haven't seen yet. Due to that, I don't see a reason to start playing with the existing SDK:s now (I don't own an old Maemo device). I'm sure the Fremantle beta SDK would be extremely useful, but only if I wanted to develop a full application. Am I wrong about this?

Qgil said "Imagine all these users that will get a maemo 5 device for their first time". This will not only be true for the available packages, but for the default install as well. I think many developers would be extremely motivated to submit patches within a short window of opportunity were you to give them an official chance to have their code on the shipping device. Even if you end up having to reject all the patches, the publicity would probably be great