Also good is Realspankings.com, Realspankingsinstitute.com, and Spankingteenjessica.com
I would also mention a great video by Extreme Associates called "Ouch!"
Sometimes realistic school paddlings at Firmhand.com are also good, especially the older vids, in my opinion.
There's also a RavenHill vid called Prepared For The Paddle which I quite liked.
Oh yes, and Gary's stuff really rocks for realism too!
(All those naughty amateurs...yummy!)