Right now (notes 8) you can creat a To Do in your list and assign it to someone else. It will send to then and they can work on it. However, when they mark it complete, it should send back an update and update the To Do in your list ( ...
To do's need to have reminders, but not only in days, but sometimes in hours or minutes.
Why is the drop down for to do 's different from all other reminders? It should be the same.
While I udnerstand to do's are in theory a project related item, many people, ...