Adding Priority levels

I understand that the way things are right now, you can already prioritize your tasks into the predefined categories. I was wondering however, if it would be possible to (maybe in the future) give tasks an added option for their priority.

For example: right now I have 10 tasks due for august 17, 2008. However, there are tasks that have greater priority and thus I would like to appear at the top of the list.

I would like to be able to give priorities to tasks and then be able to sort on priority when viewing the tasks overview.