Google is again playing hide and seek with gtalk emoticons. Since then, there have been many changes in the system but still few emoticons remains undocumented.
Important Update: More secret emoticon can be found by incrementing the end number by this URL – http://mail.google.com/mail/e/350
http://mail.google.com/mail/e/350 –
http://mail.google.com/mail/e/351 –
http://mail.google.com/mail/e/352 –
And the list goes on …
Here’s a list of utterly new emoticons/smileys:

Classic	Round	Square	Type this
Cowbell	Cowbell	Cowbell	+/’\
Crab	Crab	Crab	V.v.V
Devil	Devil	Devil	}:-)
Equal sad	Equal sad	Equal sad	=(
Equal slant	Equal slant	Equal slant	=/
Equal tongue	Equal tongue	Equal tongue	=P
Nose sad	Nose sad	Nose sad	:-(
Smile	Smile	Smile	:)
Wince	Wince	Wince	>.<
Nose tongue	Nose tongue	Nose tongue	:-P

Pig	Pig	Pig	:(:)
Broken Heart	Broken Heart	Broken Heart
Kiss	Kiss	Kiss	:-x
Kiss	Kiss	Kiss	:*
Mustache	Mustache	Mustache	:{

Beneath are emoticons from my previous post. For reference I am again displaying them here.

Classic	Round	Square	Type this
Heart/Love	Heart/Love	Heart/Love	<3
It’s a monkey!	It’s a monkey!	It’s a monkey!	:(|)
Rock out.	Rock out.	Rock out.	\m/
Shocked	Shocked	Shocked	:-o
Grin	Grin	Grin	:D
Frown	Frown	Frown	:(
Angry	Angry	Angry	x-(
Cool	Cool	Cool	B-)
Cry	Cry	Cry	:’(
Equal Grin	Equal Grin	Equal Grin	=D
Wink	Wink	Wink	;)
Straight Face	Straight Face	Straight Face	:-|
Equal Smile	Equal Smile	Equal Smile	=)
Nose Grin	Nose Grin	Nose Grin	:-D
Big nose wink	Big nose wink	Big nose wink	;^)
Nose wink	Nose wink	Nose wink	;-)
Nose smile	Nose smile	Nose smile	:-)
Slant	Slant	Slant	:-/
Tongue	Tongue	Tongue	:P

Remember that these secret emoticons works for only following flavors of gtalk:
1) Google talk gadget
2) Gmail integrated chat application
3) Google talk labs edition
You can select either of three Classic, Round or Square shape of the emoticon by clicking the blue smiley-face button at the right side of the text-entry field and selecting the appropriate shape. If you move mouse arrow over them, they again re-animate to create lovely effect.
Update 1: Our loyal reader Jared has left a comment notifying about awesome robot emoticon. Try it out with [:|]
Update 2: An Annonymous reader has left a comment with another secret smiley to express something really bad i.e. poo . Try it out with ~@~