Behaviour: "the missing link for your ajax apps", aka "use CSS selectors to specify elements to add javascript events to". Great! [via O'Reilly Radar]

The one thing that keeps bothering me a bit about AJAX and DHTML applications is that MVC tends to create fairly deep abstractions. Debugging, and, more importantly, maintaining this code, will become more and more difficult since the only way to navigate it efficiently (that I know of) is to use, well, grep, Ctrl+F, and such. Hard to refactor. Hard to analyze. Hard to validate. Full Javascript+DHTML Eclipse module anyone? I mean, one that goes beyond autocomplete. I've got that already. :)