With a file you can drag-and-drop onto your desktop or into an email making it extremely easy to send PDF's and other type files to someone else. However with the associated files of an item no such option exists. You need to "go to folder" and then drag it into the email.
I'm proposing either opening up the new Item modeless dialog to allow me to drag-and-drop files onto my desktop or into my email or adding a "send to" type feature where I could right-click the associated file and send it to an email
Mike