Randy Tinseth, who is VP of Marketing for Boeing Commercial Airplanes in Seattle, had a nice blog post about the B747-800 fleet surpassing the 100K flight hour mark. The 32 plane fleet is primarily composed of freighters, though there are a number of 747-800 intercontinental pax planes around as well.
I love the image above, which is a DHL liveried 747-800 operated by Polar Air Cargo. DHL has ownership interest in Polar and has a number of Polar 747-800's on dedicated routes in the Asian and Transpacific markets. I believe this is a delivery photo of this aircraft departing Boeing field in Seattle for the first time in late 2012. Boeing had this one on its web site at Boeing.com.