Random question, but is there a way to add your flair to an email signature?
UPDATE So the consensus is not to do it. Admins/Moderators, please feel free to close this question.
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That said, big fat sigs with images and lots of irrelevant information are ugly and somewhat rude. Don't do it.
Whether or not it's proper to do this (hey, Joel Spolsky does it, for the record) it is now possible with flair available as a simple png image: