Want to learn how to do something with rails and mootools for image slideshows.Then you can go for PhatfusionSlideshow (http://www.phatfusion.netslideshow/)
First i have to thank the developers of Phatfusion for making good image slide effects.
This article is my slight enhancement of my past article Ajax image slideshows.Here i have developed the project in rails 2.2.2 with all in ruby code.
For demo get it from
svn checkout http://genlinuxworks.googlecode.com/svn/branches/phatslideshow