I stumbled across the semi-addicting Web Seer tool from hint.fm this morning. It allows you to compare different Google Suggest results head to head, making for some fascinating juxtapositions. Google Suggest on its own can offer some interesting insights into what people around the world are wondering - going head to head provides some stark compare-and-contrast moments. The creators suggest trying "are men" vs. "are women", for example.
Checking different queries pitting Americans vs. Europeans, I was pleasantly surprised to come across this commonality: