[TxMt] small feature request: keyboard shortcut for "Don't Save"

I often end up with a large number of untitled files that I sequence through when I am done working. Some I save but many I just review and close. It would be great to have a keyboard shortcut for the "Don't Save" option in dialogs like this:

Do you want to save the changes you made in the document "untitled 25"?"

"Don't Save" "Cance;" "Save"

Very occasionally I have also lost access to the mouse while having many windows open. These windows consist of some that need to be saved and some that should just be discarded. When I do not have access to the mouse I have to save EVERY window in order to complete an orderly Quit of Textmate. A keyboard shortcut for "Don't Save" would be particularly useful here.