A Designer's Guide to Prototyping Ajax
http://particletree.com/features/a-designers-guide-to-prototyping-ajax/

Hale, Kevin
Particletree
2006

Abstract:

Jeffery Zeldman wrote earlier this year in his essay about Web 3.0 that 'Wireframing AJAX is a bitch.' And while I can't deny the statement, I do think there are steps we can take to alleviate the pain. The problem is static XHTML/CSS wireframes are woefully inefficient at the task of communicating and documenting the features available to the new crop of Ajax web sites. Because we've been working on a rather intense Ajax project for the last few months, we've been developing and refining a number of techniques and guidelines to help our team design for Ajax by moving beyond the traditional forms of functional specs and wireframes to something a bit more appropriate for the dynamic medium'rapid prototyping.