Awesome! I look forward to all Web 2.0 apps using cookie-less Ajax login code.
A few months ago a fellow named Jean-Michel Hiver posted that you could in fact do a clean and modern log-in browser interface using only AJAX methods. He didn't provide any code or much other information, but he did provide a few hints to show how it was possible to write code. I took about 45 minutes to trace his steps and verify that it was true, and it did indeed seem to be possible.