They are basically suggesting the community to add our own tests to the set of the ones they will make sure to run before each and every release. This way you can ensure that whatever the team does the functionality you need always works.
I also think that since AD cmdlets are absolutely free this is a good chance to give back and help the team make the product better for all of us.
I have already posted a couple of scripts to the thread: one just creating a user account, checking success and then deleting it, the other – adding a user and a group to another group. (The latter test by the way does find a bug in 1.0.4.)
As a nice side-effect you can use these sample scripts as examples of scripting AD cmdlets, and as sample PowerShell automated software tests.