I’ve quickly come to realize that the mobile worlds has a huge dependency on synchronization tehnology to make things work smoothly. Toucan read your email on the phone and reply from your laptop. Read rss items should be synced and just about everything else on your phone should be synced with somewhere else. The problem is that generally synchronization support is lousy. NetNewsWire is too slow syncing feeds, Mail.app doesn’t seem to notice if a message changes from unread to read and the WordPress iPhone app doesn’t seem to download drafts that you created in the browser interface. Sync is the killer requirement that goes unsaid on mobile devices. You can spend as long as you like polishing he UI but if your synchronization isn’t seamless your app will be a chore to use. If you get it right users won’t notice at all.