Flash Catalyst doesn't support easing control of scrolling components right now mainly because the Flex 4 SDK doesn't support easing control on scrolling components.
Flex 4 made some wonderful improvements to scrollers by adding animation behavior (see a video tutorial at http://tv.adobe.com/watch/codedependent/animated-scrollbar-and-slider-in-flex-4/), but the SDK doesn't provide an easy way to customize the animation, including easing.
I think easing would be a fantastic feature to add since easing scrollers seems to be a popular animation in GUI's right now. Thanks for brining this up.
It looks like there are a few work around you could consider:
1) If it ok to have your scrolling content in an embeded swf, this use an easing scroller in Flash, export the swf, and import it into Catalyst.
Here is an easing scroller for Flash I found online
2) If you take your project into Flash Builder, you can build your own custom scroller that supports easing. You might try using this Flex 3 based easing scroller that I found online: http://npacemo.com/wordpress/2009/10/24/flex-3-animated-scrolling-aka-smooth-scroll/
Thanks as always Ty, I had built a couple in flash, but you guys have made it too easy in FC ( i'm such a shortcut)
Easings not as easy as the easy non easing in FC, ( hehe )