Well - I think the FAZ isn't that far off. Granted, in the 5 days I have had the N900 now, I've mainly tried to get the GPS to work - what a joke.

Still - looking for PIM synchronisation, one finds an entry "Mail for Exchange". Hey, isn't that this Microsoft product? On my Maemo?
Around here, many people seem to need synchronisation with Google. And there seems to be none?
How do I get my KDE kontacts onto the N900?

Why on earth do directories like the default places for music, sounds, videos, documents ... have to be hidden folders? Well, they aren't hidden from that file manager which shows some weird selection of your disk content - what is shown as "Nokia N900/Documents" is actually "/home/users/MyDocs/.documents" - is this device running Linux or rather Windows?

There is this Program Manager. It seems to take it's package lists from repository.maemo.org - but it doesn't show all the stuff there is. I checked this while searching for the pakcage "location-test-gui" to debug the GPS.
Of course, I should have apt-get - installed it in a shell, but that much typing is a bit of a hassle compared to a single click.

So, a number of issues that can also confuse a N900 beginner coming from the Linux side, not just the "dumbphone users"