Interesting link for people interested in interpolation and tweening, with Flash/ActionScript or otherwise: Interpolation Tricks by Jari Komppa. An award-winning Demo coder, he explains concepts related to programmatic animation from a different perspective – he never mentions Robert Penner’s easing equations, but at the same time he’s talking about the same thing, even if using different equations. And, of course, it’s nice to find someone explain the beauty of the 0..1 range so didactically, so I think it’s some great reading.