Ajax or AJAX?

Everybody is talking about (and experiencing) Asynchronous JavaScript and XML, otherwise known Ajax. Now, my question is whether the proper term is AJAX or Ajax. I consulted the Wikipedia article and it says "Ajax" and has an explicit discussion that undid attempts to change that to AJAX. Personally, I'll stick with Ajax, until the authoritative Wikipedia says otherwize. Besides, I HATE having to type all-caps terms.

-- Jack Krupansky