Symbianware have released Power Day, a customised version of Tracker, for people who intensivly use the Today feature as thier PIM manager. It can be used with Tracker, or as a standalone application.

From Symbianware
PowerDay allows you to overview your daily events, appointments, tasks and messages in a single and great looking view. PowerDay is really clear and easy to use but at the same time it is a very powerful information managing tool. It can serve you as a default front end on your device as well allowing you to maintain running tasks (switching between applications, close them), define the list of favourite applications, speed dials, speed sms, speed mms, etc and to access them in one key press in any application and lots of other useful things highly increasing the productivity of your device. PowerDay is a fully customizable application that allows a user to change background image, colours and application appearance directly on the device in fast and easy way.