Very nice.
Clicks Install. Installed as soon as I saw it.
I modified the code so that it only shows the name-entry box when the user is not logged on, and tweaked the text shown above the box a bit:
Code:
<if condition="$bbuserinfo['userid'] ==0">
<tr>
<td>
If a registered $vboptions[bbtitle] user, $vbphrase[username] on forums :<br />
<input type="text" class="bginput" name="username" value="$username" size="50" />
</td>
</tr>
</if>