Dawn Griffith. I have no idea how long she's been with SU, but she has some of the cutest cards and thank you's that she posts, along with videos. She has a YouTube channel too. I'm a huge proponent of crafty, card-making YouTube how-to video papercrafters. It's perfect for a visual learner like myself.
Stamping Up supports CASEing and to be honest, I do too. I hope Dawn doesn't mind that I'm copying her Thank You cards. They are really cute and I just happen to own the stamp set she used, so I'd be silly not to give it a try.