I had an idea for an app... A website-specific application where all it does is poll a website for new messages sent to you, and if you have any, display a badge on the icon. Example: Facebook. Poll Facebook every 15 or 30 minutes or whatever for new messages or wall posts or whatever, and if there is one, badge the icon on the springboard with it. Launching the app will just take you to facebook.com/iphone. This could be done with any website that is popular, such as Gmail. Anyone else think this would be useful? Is it possible?