I'd really appreciate a well done integration of the phone adress book and OVI Maps.
Like in "Find places" search for the location of a contact's address from the address book. Then I can simply choose "Drive to" thus I can find the fastest way to a buddy's home.
And also the other way round:
Inside the address book a button "Show address in OVI Maps" when the contact detail is shown.
Keep improving your system by making nice integrations in your Nokia/Ovi Apps!