Actually the <iframe> trick is already mentioned on the DIsplay an Office Document page (here: http://www.xwiki.org/xwiki/bin/Code/ViewOfficeDocument ).
Jeremie / Ricardo, it would be cool if you could create a page with all the explanations needed to get the timeline to work with XWiki.
Would one of you 2 mind doing it?
Guillaume
-- Ricardo Rodríguez Your XEN ICT Team