MTurk was built by two two-pizza teams at AWS over the course of a year and launched on Nov 2, 2005. It took a few days for people to find it and catch on, but then things got busy.

At the time, AWS was about 100 people (when you were on call, you were on call for all of AWS), Amazon had just hit 10,000, S3 was still in private beta, and EC2 was a whitepaper.

What did you create with MTurk and the incredibly patient hard-working workforce behind it?