Pretty neat, but typically in a nicely scripted API like this, there's a mechanism for writing HTML to the page, whether via document.write or other.
Wouldn't it be much nicer to see code that looked like this?
The writeAll() method would be easy to make. You could also provide DOM-based options for post-load appending, or a method-or two for writing single images or images in a specified pattern or to a certian limit.
var images=new imageListInitalize();