I love those videos too! People I know have talked about trying it, but no ones actually done it. The buns I have that would probably be half decent at it or older, so i'm not sure how well it's work out for me trying.
this is some stuff i found
http://www.rabbitagility.com/?id=60 Store - http://www.rabbitagility.com/?action=Store&catid=13
http://www.yourpetrabbit.com/rabbitagility.php