Sorry, but I figured it out:
<div id="parent">
<p id="child"></p>
<div id="otherchildren"> <!-- NEW -->
<!-- Other Children -->
</div>
</div>
Instead of using [FONT=courier new]:not[/FONT] or [FONT=courier new].not()[/FONT] I put all of the other children in a new container, and addressed that instead.
$("div#parent div#otherchildren").fadeIn(5000);
Sorry, I marked this resolved.