deliciousで見つけた顔文字

East Asian style

Users from East Asia (particularly those who visit 2channel) popularized a style of emoticons known as verticons (Japanese: 顔文字, kaomoji; literally, "face letters"), which can be understood without turning one's head to the left. These styles of faces roughly resemble the style commonly found in Japanese anime and manga comic books.

The Japanese language is usually encoded using double-byte character codes. As a result there is a bigger variety of characters that can be used in emoticons, many of which cannot be reproduced in ASCII. Most kaomoji contain Cyrillic and other foreign letters to create even more complicated expressions nearing ASCII art's level of complexity.
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Basic examples
m(_ _)m bowing
(`ヘ´) annoyed
（´・ω・｀） deflated
（ ´Д｀） nonplussed, or panting
（　゜Д゜） surprised, or loudmouthed
┐('〓`；)┌ don't know the answer
（´∀｀） carefree< ｀∀´> stereotypical Korean character
（　´_ゝ`） indifferent
Σ(゜д゜;) shocked
(*´Д`) sexually excited (or heavy breathing)
〓へ〓凸　 flipping someone the bird
〓(─▽─)〓 "who cares?"

イモシーコン（emoticon）と言うらしい。
「エモーション（感情）＋アイコン」で感情を表す表現といったところでしょう。