The website is regenerated automatically every hour, so the modifications and updates are not permanent. Now, it is very easy to test the Intraweb modules and PostNuke itself. In the website there are not yet integrated all the Intraweb modules. Only 4 of 15 are available, but we will add the others as soon as we have them available.
There is no excuse not to test the new PostNuke 0.8 or $newname 1.0, you need only to create a new account and begin with your tests.