new release with
1. infra redesign, better object oriented design to enable easier sub-classing and
remove vertical/horizontal code duplications.
2. reduced memory footprint of each container.
3. bug fixes.
new Flex 3 version available!

Go to the downloads page to get it.
sample usage applications here,
http://strawberrypixel.com/blog/flex-components/#hsmoothbox
http://strawberrypixel.com/blog/flex-components/#vsmoothbox