Via Jim comes another great tutorial on Beast Skills (if you haven't already seen the site, have a look around - there's some fascinating stuff on there) regarding standing ab rollouts.
Warning: they're much harder than he makes them look.
Incidentally, if you want to see some video of someone making these look ridiculously easy, go no further than Ross Enamait. There are a few on the Low Tech, High Effect video [.wmv, 5.1mb] , and The Home Gym [.wmv, 6.1mb] trailer. Good stuff.