show related document fields
It would be great to be able to build a view across related documents, so that you can search for all documents that are related to a search criteria of the "parent" document.
I currently accomplish this by adding hidden fields on the "child" document, and keep them in sync via a script.
Another way I thought perhaps this could be done, would be to have a "calculated field" type. This field could have a formula that would pull in the value of a field from its "parent" document. Hence, it would be less script dependent and more dynamic.