2010 Red Book doesn't mention 2008-W reverse of 2007

Just got the 2010 Red Book, and am puzzled why they didn't list the 2008-W Silver Eagle with the reverse of 2007. It's a pretty well-established variety and has been known for at least a year now. Thoughts?
Alos noticed that the Red book dropped the American Arts Gold Medallions series 1 year after listing them.
Alos noticed that the Red book dropped the American Arts Gold Medallions series 1 year after listing them.
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.........you'll have to wait for the 2011 edition.
Guess we'll have to wait til next year for them to catch up.
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Maybe Dentuck can answer that for us.