Duplicate Content Solution from Google

Google themselves have come up with a solution to duplicate content. Read their blog and don't forget to read all the comments. Interesting.

Most people don't realize how much of an issue this is. This solution isn't just Google. It is a Yahoo-MSN-Google joint venture. I have been tracking my supplemental index ratios for 2 years now and URL parameter caused duplicates are the biggest factor in not getting all of your content indexed in the main index. It was a ten minute fix to use the tag instead of rewriting the apps, which for larger apps can be quite painful. You can go either way, but at least now you have a choice.