When editing a task (or really any other large textarea), it would be nice to have an alert if another user is actively editing the same task. It would be really nice if you hit "save" and then a list of conflicts is presented with the option to reject/accept the other edits.

Example use case: Was working with a team member on the phone, we both were trying to edit a task's description and we basically had to take turns to avoid stepping on each other's edits.

I imagine there are other text areas (wiki, for example?) where that might be a nice feature that you could re-use.