Nice, I can see this coming in pretty handy. Still, I prefer wikipedia, but I can imagine this one coming in really handy when you just want to find some facts fast.
The Netherlands - 41 526 km^2 (square kilometers) (world rank: 135th)
Wisconsin - land area | 141 000 km^2
United States - 9.631x10^6 km^2 (square kilometers) (world rank: 3rd)
The Netherlands - 16.4 million people (world rank: 61st)
Wisconsin - 5.557 million people (2006)
United States - 306 million people (world rank: 3rd)
Some surprising numbers, really. The northern part of the Netherlands resembles Wisconsin very much. A lot of agricultural ground. Never though we'd have 485 people living per square km.