It's freely available under the GPL. With <a href="http://www.TortoiseCVS.org"target="_blank">TortoiseCVS, you can directly check out the latest <a href="http://www.PostNuke.com"target="_blank">PostNuke-Code and stay on top!
Once you got the latest cut, you can update easily, commit and see differences by right clicking on files and folders within Explorer. For a good introduction, see the nice <a href="http://centre.ics.uci.edu/~grape/modules.php?op=modload&name=Wiki&file=index&pagename=TortoiseCVS"target="_blank">Tutorial on docs.postnuke.com!
regards
martin
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