Whereas I prefer to use SyncML (or other syncing techniques) to give me a single common addressbook and diary across multiple systems and devices. This allows me to update once (from any device), especially phone numbers without having to remember to update every device, and also allows me a form of backup recovery should I change device (whether by choice or not).

SyncML isn't the only way to achieve this, but the majority of the rest of the NSeries devices support SyncML, and as an Internet Tablet, SyncML support would seem the sensible way to go.

Obviously, many people would also want or like Outlook syncing, but syncing and PIM functionality (Calendar, Contacts) should go hand in hand (in my opinion). Whether that's developed or only supported by Nokia, as a consumer I don't care - I just want the functionality to be there.

And as all apps being fully integrated and using this single contact list - I agree it should be a design principle wherever possible, but equally I'm happily for my Skype list to be separate right now, although combining it all into a single contact list would make sense for Skype to encourage us to use Skype for ringing any number in our contact list.