1) the exact link of the latest nwiki ishttp://appserv.lsi.upc.es/palangana/moodle/course/view.php?id=15
Remember that dfwiki is designed for moodle 1.5 but works in 1.6 and will not work in 1.7
That nwiki is designed for moodle 1.6 and will be a specific nwiki release for 1.7 when the beta comes.
2)The dfwiki markup editor filter is a good idea ( since you can do it with the current wiki, and the preferred wiki syntax is dfwiki. I raise an issue on the tracker.
3) we must develop also the filter... another issue is raised.
Thanks for using dfwiki and your suggestons ... I'm glad you made it
Ludo