Paul just pointed out that Discovery are buying HowStuffWorks.com, for $250 million. Not having much memory of HowStuffWorks beyond it occasionally surfacing in Google, I visited it and can confirm that it is absolutely worth the money. Just on the front page today:
How Machineguns Work
How Bats Work
How Quantum Suicide Works
All Discovery need to do now is buy up Look Around You to run practical demonstrations.