Not sure if this has been discussed before, but having a way to quickly move tasks to different projects would be a great feature to improve the management and organization of tasks. Right now, the way to move a task to a different project is by 1) clicking on a task to see detail, 2) clicking on Move, 3) type in the project where the task is to be moved to, 4) click on the project.
Being able to drag and drop a task to a project on the side bar would streamline this process and enhance the user experience IMHO.