Alex Thanks for the neat article. However have to disagree with you a little. - The notion of consistent user experience is an illusion. Each platform, even the ones you have named, have their own approach to UE. If you talk of consistency within the tenets of the particular platform then maybe it could work. - UI as monetization channel works if advertising is the primary revenue earner. But this approach helps very few apart from the Google's and high volume sites of the world. The primary premise is interesting and I definitely think companies should invest in building of client user experiences. That said every service API could more usefully spend time thinking about Data Experience before User Experience. Thanks again for the thought provoking post! - Mahesh CR from FriendFeed MT Plugin