Don, unfortunately I don't think it's possible to add emoji (graphical text icons) using the SmarterMail web client. Alternatives:
1) Use an email client like Thunderbird
2) Copy & Paste the emoji from another source
I just started a new thread for this (sorry, I didn't see your post until just now). Hopefully people will vote it up so ST can add it to their list.
http://portal.smartertools.com/community/a87190/emoji.aspx
Kevin
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