There have been a number of packages landing in the Cydia store that offer alternative ways to handle the banner notifications that were introduced by Apple as part of iOS 5. There was a definite need for the notifications system to be changed and the introduction of banner notifications is a step forward but some users feel they need to be made bigger to display the full text or have some additional customization options applied to them. If having the alert of the title read out to you in a Siri voice was on your wish list then the TitleSpeak package is probably right up your street.
