Do you want the first line of the textarea to be bold after the user has finished entering all data?
You could handle that by having a js or server script grab the first line and put that in a separate variable, so it outputs it in a different markup (an h3, perhaps).
Or, if you want the user's title to just standout from the rest, why not have an input for the title and then a textarea for the body, like:
<form>
<p>
<label for="usertitle">Title</label>
<input type="text" name="usertitle" id="usertitle" />
</p>
<p>Body</p>
<p>
<textarea></textarea>
</p>
</form>
This way, the user gets that sense of importance you want. You could even add some javascript that changes the input to an h3 after they start tying in the textarea.