The Scriptographer team has just released version 2.8.050 which is compatible with the all new Adobe Illustrator CS5. (And it’s of course also compatible with CS4, CS3, etc.) From the Scriptographer site:

Scriptographer is a scripting plugin for Adobe Illustrator™. It gives the user the possibility to extend Illustrator’s functionality by the use of the JavaScript language. The user is no longer limited to the same tools that are used by most graphic designers around the globe. Scriptographer allows the creation of mouse controlled drawing-tools, effects that modify existing graphics and scripts that create new ones. But Scriptographer is also a webpage on which users can exchange scripts and ideas. Scriptographer gives the tool back into the hand of the user and confronts a closed product with the open source philosophy. If that sounds good to you, download it today.