I would like it if I could express the following type of idea in my ToDo lists.
Item: Colate sales data -- assigned to my co-worker
Item: Generate supply forecast -- assigned to me
Item: Write Report -- assigned to me -- waiting on "Colate sales data", "Generate supply forecast"
Items that are waiting on other items don't show on focus list.
This concept should be usable to place delegated tasks in a waiting state even if the party delegated to isn't a ToDo Cloud user.