Excellent article here on using your website’s Sidewiki – a tool provided to users of the Google Toolbar to allow them to jot notes down for websites they visit, appears as a sidebar in the user’s browser.

You can claim your own website’s Sidewiki, there are very good detailed instructions for doing that here, and place a nice welcome message for users in this area.

How to Claim Your Website’s Google Sidewiki – Vizion Interactive, Inc..