Anybody wishing to ad the search box to their site will need to add this could into their site:
<!-- Google CSE Search Box Begins -->
<form id="searchbox_003362935116155105177:oeydnrcfvyw" action="
http://www.google.com/cse">
<input type="hidden" name="cx" value="003362935116155105177:oeydnrcfvyw" />
<input name="q" type="text" size="40" />
<input type="submit" name="sa" value="Search" />
<input type="hidden" name="cof" value="FORID:1" />
</form>
<script type="text/javascript" src="
http://www.google.com/coop/cse/brand?form=searchbox_003362935116155105177%3Aoeydnrcfvyw"></script>
<!-- Google CSE Search Box Ends -->