The good and the ugly of Ajax

A rather good approach to Ajax from a software architect's point of view:
Behaviour : Using CSS selectors to apply Javascript behaviours

Ben says: After all the work of WASP and others to promote clean markup, valid pages and graceful degradataion via css - it sucks that we're going back to tag soup days by throwing javascript tags into our html.
I am still not sure if Ajax-technology is ready for primetime deployment. Don