Sorry if I sounded mean, I was in a bad mood. I feel that the UI is good, BUT a little overambitious. With all those features (Lemme name a few: Map, Attachments, Calender, Themes, Address Book, Sharing, ToDo, etc..) its going to be difficult.

Or, maybe I am just underestimating the power of the tablet, and this app (which I would say is desktop quality, or at least iPhone quality) could really come to the tablet! Good Luck!