Check out this:
http://googlewebmastercentral.blogsp...-features.html
Google is pushing it way too far in my opinion, it's certainly not their decision where to send my 404 traffic. Especially "If all else fails, there's always a chance that similar content already exists elsewhere on the web. The Google web search can help your users to find it - the Toolbar will help you by adding the keywords found in the URL to the search box."