Here, give this a whirl. (Should work, as I don't have your webformmailer.php
code).
You also left the VALUE's empty. I popped 'em in there for ya.
<div id='form_wrap'>
<form id="contact-form" action="webformmailer.php" method="POST" >
<p id="formstatus"></p>
<textarea id="inputtext"></textarea>
<input type="text" name="name" value="username" id="username" placeholder="Full Name" />
<input type="text" name="email" value="email" id="email" placeholder="Email" />
<input type="submit" name="submit" value="Submit" />
</form>
</div>
This is assuming your form handler contains something to the affect of:
$username = $_POST['username'];
$email = $_POST['email'];