Start date and Due date

One of the features I love on Toodledo, and really the main reason I’ve been using that site, is separate start dates and due dates. I’d love to see something like that implemented here. The way I use it is the start date is the date I want to start doing the action (or at least seeing it on my list). Before the start date, the action remains hidden (if I have it set to hide future actions). And then the due date, frequently a later date, is the date that I actually get in trouble if the action is not done. Example: For paying bills, I would not see the bill on my action list until the start date (say it’s today), but I have until the end of the week until the due date – also an important date to keep track of. For repeating items, both the start date and due dates move forward, in this case by a month.