Auto-populating the URL Settings field of a new node (specifically, CCK node)

Hey guys,

I was wondering if anyone has worked out a way to get drupal to autopopulate the URL Settings field when a new node is created?

For example, if the node type is an 'article' and I have it a title of 'My new article', I would like the URL to automatically be 'article/my-new-article'.

Conceptually I can think of a few different ways to do it, but I was wondering if someone else already has?

Cheers,
-Fin