The Müller-Meerkatz business is one of the largest in the Amway world, reportedly approaching 300 Diamonds and nearly 7000 platinums. They were the first Crown Ambassadors outside of North America (qualifying in 1979) and achieved the level in just 34 months!
Their business today includes multiple other Crown Ambassadors, including FAA 54 Founders Crown Ambassador Max Schwarz.
The blog is at http://peterundevamm.com (Peter and Eva MM) and was started on August 1, 2007. Every post is available in German, English, Russian, Italian, and Spanish, obviously to cater for their many IBOs around the world. Interestingly, the logo for their blog includes both their own organizations name, World Wide Diamonds, but also Top 4.