Some bastard removed the 2ch emoji from wikipedia, so here's a link to an older version of the page:
http://en.wikipedia.org/w/index.php?title=List_of_emoticons&oldid=464490817#2channel_emoticons
Some of the more useful ones:
(╯°□°）╯︵ ┻━┻ (ノಠ益ಠ)ノ彡┻━┻ ┬──┬ ノ( ゜-゜ノ) （ ´Д｀） キタ━━━(゜∀゜)━━━!!!!! ｷﾀﾜァ*･゜ﾟ･*:.｡..｡.:*･゜(n‘∀‘)ηﾟ･*:.｡. .｡.:*･゜ﾟ･* !!!!! (*´Д`)ﾊｧﾊｧ (☞ﾟヮﾟ)☞ or ☜(ﾟヮﾟ☜)