When I use Outlook it's a nice feature to have the "last modified" and "created" fields. So I can search for saying tasks I've created yesterday.
Why not have access to this fields in DO? I think it would be useful to have lists like "last added contacts" or "appointments added by the last sync". At least you could add appropriate sort options so I have last modified items at the top of a list.

Greetings, Halweg