I'd also add +1 for Jan's comment: alerts for all entities ... meaning everything you can display as a column or filter by. Not just CRM cases and contacts.
currently if filter is sorted by due date ascending, "no due date" tasks always come first, even though they are usually less important than those with any due date. It would be better to move "no due date" tasks at the end, wouldn't it?
this would make notes much more useful (all notes are not important)