WP7 Auto Grow ListBox upon reaching the last item

Question

I'm trying to achieve an effect where more items are appended to the list when the user scrolls down to the last item. I haven't found a way to determine if the user has scrolled to the end of the list. I don't see a event on ListBox that is fired when the user reaches the bottom of the list. Something that tells me when an item has been scrolled into view would be great, but as far as I can tell, there is nothing like that.

Is this even possible in WP7?

Edit: Another way of saying this is, can we detect when a list has "bounced"?

Answer 1

Daniel Vaughan has posted an example of how to detect for this at http://danielvaughan.orpius.com/post/Scroll-Based-Data-Loading-in-Windows-Phone-7.aspx