Always wanted to post to this thread but I don't use much flash so have limited opportunities. Anyway, thought this offered a set up with a twist:
Set up: go to the park with 40D, child steals camera, snap pic with iphone...
Eat my camera by Wissigle, on Flickr
Result: take camera away from child and take picture...
20120709-IMG_6841.jpg by Wissigle, on Flickr
OMG, she's so sweet!!!
What a lovely child! Congratulations, all the best!!!
Is that a 40mm on your 40D?