Add attributes to the scrollbar property UI to allow easing into user defined distances. This would allow easy creation of slideshow modules such as the horizonal gallery [http://www.google.com/help/maps/favoriteplaces/gallery/#los-angeles-ca] or any of the horizontal scrollers on the home page of [http://www.wsj.com]

(I've created a few slideshow prototypes by now using a combination of FC and FB, so I know it can be done, but it's certainly not easy... and it could be!)

Bonus: If a scrollbar is connected to a data list, one checkbox to automatically calculate the scroll distance per click. Shazam.

It would be nice if you can scroll in the timeline. So, if you wan't to make an annimation after 15 sec, that you don't need to make the timeline smaller.