From Skyhook Wireless:
MyMoody.com is still in early development, but the site gives you a dynamically up datable mood image for use with any HTML enabled forums, Web sites, and chat rooms. When your mood changes, simply log back into MyMoody type your current mood and wherever you have posted your MyMoody, it will change automatically.
MyMoody will display your current mood image on your desktop and clicking it will allow you to sign into MyMoody to update your mood. This version is the first release on CNET Download.com.