My big complaint right now is the the complete lack of a task list. There really should be a todo list to sync with my iCal. I use my task list heavily in conjunction with OmniFocus to track my todo list.
Another missing widget is an address book. All my contacts are there but how do I get at them directly. Let’s say someone hands me their business card. How do I add this new contact? How can I edit notes on a contact? Hopefully I am missing something. I have found I can get to the contacts inside of Mail but that is not natural for me now that I am used to a stand-alone address book program.