As part of the 5th year anniversary for WoW, Blizzard has decided to make a mosaic from both alliance and horde players, and I am not talking about their toon's, but rather about their counterparts, like you and me. To be a part of this, all you need to do, is goto this site - World of Warcraft 5 Year Anniversary: BattleCry download and print out either the horde or alliance insignia, print it out, and take a picture of yourself and the insignia. You can also do it with your friends, and I would assume if you wanted to mess with the images a bit, then thats possible too.
Each time a piece of the mosaic is released, then an easter egg will also be revealed, such as the recent release of the early conceptual art of the Dark Portal.
Do you need to be a WoW player? Nope. In fact I would assume that if you were a LOTRO or EVE player, made a screenshot of your character/ship and shot it with the Horde or Alliance insignia, then Blizz would probably put that up as well. I say this, because I have known about this mosaic deal for about 2-3 weeks, and so far, only 1k people submitted AND they had to reuse some of the photos. I assume that they will do more reusing as well, as time goes on.
Am wondering if I could slip in an mmoexploiters logo in the batch, lol. Probably not but worth a try.