I would like to display the users profile picture inside of my applications canvas page, is there a way to do that using the graph api?
I know I can do it using FBML
EDIT: So facebook has changed it again! No more searching by username - have amended the answer below...
https://graph.facebook.com/{{UID}}/picture?redirect=false&height=200&width=200
e.g. https://graph.facebook.com/4/picture?redirect=false&height=200&width=200
Facebook Graph picture doc