orz
Boing Boing: All about Orz
"orz" apparently is a word that refers to the bodily pose in the image above.
"Orz" is a popular symbol, a pictograph, a fun stuff, a strong meme, a fashion and even a subculture in Far East Asia since last year. It's originally from japan and spread soon to other countries such as China and Taiwan. It illustrates a guy facing left and kneeling on the ground, the "o" means the head, the "r" means the hands and the body while the "z" means the legs. People use this pictograph to show they failed and they are despair or in a sad mood ("??" in Chinese or japanese Kanji) in the Internet. People often not read "orz" out, but spell it out in ordinary conversations.
There are many alternative forms of "orz" including "or2", "on_", "OTZ", "OTL", "STO", "JTO" and so on. And there are more and more web sites in the name of "orz". For instance, a online service to prove shorten urls is called '0rz.net', and there is a blog about "orz" in Japan: Link. Here's more interesting orz-related stuff: Pictures about orz, products in orz fashion, signs of orz, a flash game about orz, "paper craft of orz," and here's a comic which says archeologists found "orz" symbols in an ancient ruin.