Beside of the adobe.com and Google.com itself, I think it's hard to find those PR10 sites, although they did exist somewhere around the internet...
A few newbies from Google's recent PR update, http://www.apple.com/itunes/download/ PR = (10/10) http://www.cnn.com/ PR = (10/10) ROOFIS
Back again check this one piwik.org it's an open source web analytic's monitoring site,an alternative to Google analytic's there's still probably more out there but far and very few in numbers. ROOFIS