Bert gave a beautiful demonstration of the power of Etoyshttp://www.youtube.com/watch?v=WUxMP46PM-Iand the ability to create your own tiles.
My talk http://www.youtube.com/watch?v=clU3vKxwOXc&feature=related is also posted (if you only have time for one watch Bert's it's much better).
Hope to post more soon.
Stephen
squeakland@lists.squeakfoundation.org