The latest version of the slides is here.

Downloads:

If using Linux or Mac, you can import those files by doing:

mysqladmin create nlwiktionary && bzcat nlwiktionary.sql.bz2 | mysql nlwiktionary
mysqladmin create osm && bzcat osm_backup.sql.bz2 | mysql osm

Things that you may find useful (you should already have these or they are not strictly required for the tutorial):