Guessthelogo.com puts highly visible logos in front of you and asks you to choose the correct iteration. Players with the fastest times get bragging rights on their site (like a video game in an arcade).
About David Burn
Co-founder, editor, and publisher of Adpulp.com. David wrote his first ad for a political candidate when he was 17 years old. She won her race and he felt the seductive power of advertising for the first time. Today, David is a creative director in Austin, Texas.