An experimental tactic here, using custom getter. Would take care of broader MSAjax context, but is fated to be demonstration-only for now because there are no getters in IE pre-8. Haven't timed it but there is going to also be some overhead.
http://mootools.net/shell/gYSyV/3/ I worked on this for quite a while tonight. I have no plan to use MSAjax at any time but wanted to help Moo and MSAjax coexist for other people. Please consider this before telling me to shut up. -- Sandy