The best mobile mail app has gotten even better! iPhone 4 Mail.app will have a unified inbox which means all your emails will show in 1 list. It’ll also support multiple exchange accounts, fast inbox switching (multitasking?), threaded messages ( yay! ) and let you open attachments with apps. If it lets you chose which third party apps to use for attachments, consider me as won over by this feature!
Apple, this was a long time coming, as were most other features that you unveiled yesterday.