Microsoft Australia’s “Ten Grand is Buried Here” treasure hunt is now over and Long Zheng of istartedsomething.com has compiled a list of all the clues and their respective answers in a PDF document.
3000 Upside Down
3000 in Roman numerals is MMM. Upside down it becomes WWW. This signifies the beginning of the URL.
BTW, if you enjoy the clues and answers, apply for a Mensa membership as soon as you are done. If you don’t have one already, that is.