Some examples of mail functionality - Vertical and Right View, Message Writing Interface
Some examples of calendar functionality - Privacy List, Contact Import Dialogue, Chat Window
Some examples of calendar functionality - Week View, Agenda View, FreeBusy functionality
Some examples of Contacts functionality - Business Cards View, Phone List View
Some examples of Sidebar - Communication History, Quick Contacts Information
Some examples of automated functionality - Account Import Dialogue, Server Settings Auto-Discover, Data Import Dialogue