iPhone One-Click Access to Mail, SMS, Phone

I wish Apple would create a "one-click" access to certain apps. For example, why not have multiple slider bars on the welcome screen that would unlock the device? If you have a new SMS, then there is a slider bar that would unlock and open your text message. Same for email, phone calls, voice mails, app store updates, calendar, weather, etc. You could customize app unlocks that you always want there, and you could also state which ones you want to only show up when you have something new.