Yup, Carla made a pretty nice tutorial. I love how she used different sized irons.
And like Nurinia ( daer0n ) mentioned, there are tons of great tutorials on using a flat iron to curl hair. When I use a flat iron to put curls in my hair, no one can tell i used a flat iron.... it looks soo nice and it looks like i spent a ton of time putting the curls in... but i didn't since the flat iron is realli hot ( i use the CHI)