I'm seeing more and more email missing signatures and salutations. Based on the fact that this information is generally in the email headers I can understand why.<p>Do you use them?
When messaging strangers or clients I always use both.<p>Internally I can afford to be far more casual, indeed it helps to cut out salutations as it means colleagues don't have to read/ignore dross. Sometimes an email is just a subject line followed by 'EOM' End of message.