Well, I have to say your site looks GORGEOUS, aishagrace. Really great logo and color choices. (I’m looking at it in FF 2.0.) I kinda like the flat search field as it is.
But if you want to change it, what the other site did was (apparently) override the stock WordPress one. (I did this on our site, too.) Looking at scobleizer’s code, it’s pretty easy to use.
In your page’s code, you have this:
<div id="searchdiv">
<form id="searchform" method="get" action="/wordpress/index.php">
<h2>Search</h2>
<div>
<input type="text" name="s" id="s" size="15" /><br />
<input type="submit" value="Search" />
</div>
</form>
</div>
Try deleting that code (save it in a text file in case you have to put it back!!) and replacing it with this, which doesn’t rely on any CSS formatting, and should default to the same look as that on scobleizers:
<div>
<label for="s">Search:</label>
<form id="searchform" method="get" action="/">
<div>
<input type="text" name="s" id="s" size="15" /><br />
<input type="submit" value="Search" />
</div>
</form></div>
Alternately, you could just try taking out the following line from your code:
<div id="searchdiv">
And, of course, taking out the next </div>
too.