Zeh, the brains behind Tweener, has done it again. One of the main goals of Tweener was to create a system designed to allow the creation of animations (be they simple or complex) very easily. This goal was definitely accomplished. However, designing something that is appealing to the crowd wishing for simplicity, often leaves the crowd looking for more power, in wanting. Furthermore, attempting to appease both crowds congruently, is often like getting a camel through the eye of a needle.
I never thought Brazil had camels, but Zeh just threaded the needle with one. Introducing, Bezier curves in Tweener. Check it out.