Feedburner does have a "FeedFlare" facility that allows users to email an individual post but it means that they have to fill out a form and type a "Captcha".
Most people resist this.
Thanks to Ben Hall's 'Add link building links your blogger posts' I added a more conventional href="mailto:..." entry to the bottom of each post.
The following code goes just before <div class='post-footer-line:
<a expr:href='"mailto:?body=Thought you might like this: " + data:post.url + "&subject=" + data:post.title'>Email It!</a>
NB: it is pretty important that you use the string &Subject= when pasting in the HTML template
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