Contest is now closed. Winners are being contacted directly and the full list will be posted tomorrow (hopefully - it takes a long time to send out 250 emails).
WoWInterface, along with our friends at Wowhead, has received a large number of Mists of Pandaria Beta keys to give away to our users. These are separate from the ones we are giving to authors. As well, we've got a couple headsets to sweeten the pot.
Help WoWInterface extinguish the midsummer bonfires hidden all around our site! Just follow the clues linked above. If you find one click on it and you'll be entered into the big beta key give away. Once you find all five hidden on WoWInterface head over to Wowhead to find some more and improve your chances at winning!