Some of us might get the "A new member could not be added to a local group because the member has the wrong account type" error while configuring the Reporting Services add-in for MOSS 2007.
When you click on the "Grant Database Access" link on the "Application Management" tab of the central administration site, on the upcoming page, you have to give the server name and instance name of the report server. If you installed MOSS 2007 on a domain controller ( we do that for testing, instructing purposes, never do it on a real life scenerio :/ ) you have to give the full DNS name or IP of the report server. If you give onyle the computer name of the report server, you get the error I specified error. So be careful about this situation. :P