Mining your email to automatically broadcast your mood. Can also broadcast collective moods (e.g., in an organization, country, etc.).

[amichail]

[amichail]

This can give you useful information. For example, you might delay an email asking for something if the receiver is currently in a bad mood or too busy.

This could also be useful for suicide prevention. Imagine Google doing this with gmail to keep its users mentally healthy and safe. Signs of depression would be reported automatically.

[sajid]

Interesting idea, Jonathan Harris has already done something like this for the web.

See:

http://www.wefeelfine.org/methodology.html