I think this is the first time a full XML dump of Citizendium is publicly available (CZ offers dumps but only the last revision for each article, and our previously efforts generated corrupted and incomplete dumps). It contains 168,262 pages and 753,651 revisions (9 GB, 99 MB in 7z). I think it may be useful for researchers, including quality analysis.
It was generated using WikiTeam tools. This is part of our task force to make backups of thousands of wikis around the Internet.