Ciprian Turcu

widget that you can place in your sidebar and that will show the blogger current mood by selecting one of the 12(so far) emoticons available. 
You can select 4 different sizes, depending on the size in width of your sidebar(so it fits just right).
Update 1.1: 4 more emoticons added 
Update 1.2: Dynamic Title(changeable from widget page) 
Update 1.2.1: Fixed a small design issue and aligned mood icon to center 
Update 1.0.1 Small other important design issue 
Update 1.2.3 Small admin_menu fix for wp 2.8.1 
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Mood Personalizer

Widget that you can place in your sidebar and show your current mood.

Cople

TinyMCE Smiley Button

A nice to have would be to turn the text in the wysiwyg to a smiley. EG. :) <- Would turn into the smiley image after a space is added. A client of ours wants this functionality so i shall send relevant code to do so once i've figured it out. :)

Mood Personalizer vs TinyMCE Smiley Button