I’ve created a non-invasive plugin for including some of the basic JavaScript libraries that I use (namely Prototype.js and Scriptaculous). While there is no added benefit of including this plugin alone, any RIA plugin that I release in the future will more than likely depend on this — so watch for these soon.
Click here to download the plugin (tar.gz) (updated 2/16 for Scriptaculous 1.5.2)