Man, I wish I had the energy to get into this discussion last night, but my tablets don't work well as a salsa partner :P

The mockup is a bit on the weak side in some respects, but follows what we've already seen from S60v5 in terms of some of the layout and button arrangement.

The idea that all data will be linked is nothing new, and is as much as what Palm is doing with the webOS, and Android is doing (but is allowing carrier control of those linkages). The key here will be if Maemo will stay something of a community-led effort, or if Nokia will shift the effort towards carriers, allowing communities such as this to tweak and do with how they need. And if you think about it, making the OS a battle ground for carriers and users is a pretty nasty strategy to play both sides of the fence for.

In terms of widgets that talk right into the OS, and then link over those links - nice idea. S60v3 could have done it; v5 should be doing it. Maemo should have been done this as well. Ironically enough, the Sony Mylo does this already - its just not as open as Maemo.

I like the idea, but the screenshot has me thinking that form factors are going ot be toyed with heavily. Something like dual and folding screens (Nokia Morph Concept, OLPC 2, etc.) being the driver for making the OS as transparent as possible, and at the same time as ready for the user as possible without as much intervention. Its going to cause Nokia to piss off some developers because there will need to be some tight rules around "best practices" for certain types of software.

Don't be surprised if the idea of not having a browser comes up It just seems too plausable when you are dealing with linked data like this that a browser (in the traditional sense) is just not needed.

EDIT: Oh yea, I doubt that anyone from Nokia will talk in this thread; at least for the time being. There is way too much that could go wrong in terms of efforts towards M5 if Hamarratan is spoken off too soon - even in an unofficial capacity. If anything, let's just let the Nokia employees and stakeholders be for this one, and enjoy the fact that Maemo is getting some of the Silicon Valley attention that will be needed for M5's devices and Nokia's efforts in the more mainstream techie audiences.

EDIT #2: Any developers looking at making a suitable calendar app that does more than just tell events, should really take this screenshot and go to town.