A few days ago we enabled community annotation on our Exchange Server 2007 documentation (Exchange Server 2003 documentation got this a few months ago). Community annotation enables you to add your own mark to our docs so that you can share things you've learned with your fellow Exchange admins. Find a great way to set something up? Learn something new that you haven't found in the docs? Add it all to the community content section of the Exchange docs and let the rest of the world know!
You can add community content to any Exchange Server 2007 or Exchange Server 2003 topic at http://technet.microsoft.com/en-us/library/aa996058(EXCHG.80).aspx.
Find details about community annotation on the MS Exchange Team blog.
If you have feedback on how the community content feature works, feel free to send a message via the contact page.