why does Kevin keep asking about the Purple Brain?

Answer 1

The 'Purple Brain' was a marketing event for Answers to kick off the "Ask the Planet 2006!" thing. It was located in Times Square and some of Answerers got to go and answer questions there for 72 hours straight. There was a live feed which was cool.

http://advision.webevents.yahoo.com/asktheplanet/brain.html