This is an example of what I am looking for:
http://meta.wikimedia.org/wiki/Lista_de_Wikipedias#100_000.2B_articles
There you can see a table of results and a little icon into each header cell, so that if you click that little icon, the entire table is sorted (ascending or descending) by that column, in an Ajax way, that is, without reloading the entire page.
What I am looking is something like that, and more.
First, I would like to add some controls or a little form (maybe with a droplist control, or a little search box) in order to select the content to be shown, in a dynamical/Ajax way (I mean, if the user makes a new selection, the content shown below changes, but the entire page is not reloaded).
Afterwards, I would like to add some controls in order to control the way the information is shown (like in the example of Wikipedia above).
So, I think there are "two levels" in Ajaxizing my content: selecting the content to be shown, and sorting or changing the appearance of that content which is already being shown.
Sorry for insisting but, is there any standard way to perform this within MODx??