I used to like GemSay for automated messages.
http://www.wowinterface.com/download...93-GemSay.html
But a smaller, more focused addon could be made or may already exist.
(PS- I moved your thread to the search/requests forum.)
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff,
The Tao of Pooh