Hi Marcelo,

Marcelo de Moraes Serpa <celoserpa@gmail.com> writes:

> I'd like to add a new column to display some information about the
> scheduled item in the agenda. Take the following screenshot: https://
> www.dropbox.com/s/gkcnbjrivhvql46/orgmode.jpg
>
> I'd like to add a colum there that shows the closest parent with the
> :project: tag. Does org provide any APIs for that? 

Nope -- check the org column tutorial to see the possibilities:
  http://orgmode.org/worg/org-tutorials/org-column-view-tutorial.html

Also check org-agenda-filter-by-top-headline (which is ^ in agenda
mode): I think it can help you *not* implementing this view...

--
 Bastien