Over the last few weeks, we've been keeping you updated on our Treasure Hunt competition — a puzzle contest designed to test your knowledge of computer science, networking, and low-level UNIX trivia. And now it's coming to a close. The fourth and final puzzle will be released at 1212448500. With it, we'll also be highlighting Google Developer Day, which is coming up on June 18 at Wharf 8 in Sydney.

We'll be announcing the contest winners (and their handsome rewards) once the results are tabulated, so keep your spyglasses here over the next few weeks. And, of course, all the prior weeks' puzzles are still available on the main page.

You've come this far... be ye real treasure hunters or just landlubbers in disguise?