Here is a use case - Push mail implemented as widget. Details: widget is running on the mobile phone, SMS message arrives alerting user to some changes. User clicks on a link in URL and a corresponding widget opens and picks up the changes from the Web. This would allow push-mail implemented as widget and many other enterprise scenarios - I can see many uses in CRM, for example. What is important - without widget having its own URL such applications become impossible to create. Please drop me a note if you see ANY workaround based on current Widget spec?