You can view the release history of any page by clicking on the Old revisions button at the bottom of the page.
This will show you the history of the page since the Wiki was ported to DokuWiki in August 2008. History before that date is still available by looking at the history for the corresponding page on the old Wiki which has been retained for archive purposes.
You can also subscribe to the “recent changes” RSS feed, which is how your site owner keeps tracks of what's been posted here.