Not to mention drag-and-drop support, which is why I don't use a webmail client as my main vehicle for email (which allows some nice workflow together with Expo

Not to mention drag-and-drop support, which is why I don't use a webmail client as my main vehicle for email (which allows some nice workflow together with Exposé) I'm also used to the excellent inline PDF viewing, quicklook for attached foto's and documents and the data detectors for addresses and phone numbers.