The release of OpenOffice.org 2.4 (X11 version) is a little behind the other platforms due to a lack of resources in the QA process, as many of the resources have been placed on the upcoming aqua version. It will be another few days to week before they are available on the mirrors and the Mac Port download pages will be updated at that point.
Thursday, March 27, 2008
Until then the new smart download pages will continue to give the link to the 2.4.0 build which isn't yet available.
UPDATE: OpenOffice.org X11 2.4.0 for both Mac OS X 10.4/10.5 PPC and Intel are now available from the Mac Porting Download pages.