Below is html code you can use to create a 2x2 or 3x3 Ustream multicam interface.
2x2 (suggested width/height settings - width=312, height = 255)
<table style="text-align: left; width: 640px;" border="1"
cellpadding="2" cellspacing="2">
<tr>
<td></td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-weight: bold;">Cam1</td>
<td style="text-align: center; font-weight: bold;">Cam2</td>
</tr>
<tr>
<td></td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-weight: bold;">Cam3</td>
<td style="text-align: center; font-weight: bold;">Cam4</td>
</tr>
</table>
3x3 (suggested width/height settings - width=208, height = 170)
<table style="text-align: left; width: 640px;" border="1"
cellpadding="2" cellspacing="2">
<tr>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-weight: bold;">Cam 1</td>
<td style="text-align: center; font-weight: bold;">Cam 2</td>
<td style="text-align: center; font-weight: bold;">Cam3</td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-weight: bold;">Cam 4</td>
<td style="text-align: center; font-weight: bold;">Cam 5</td>
<td style="text-align: center; font-weight: bold;">Cam 6</td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-weight: bold;">Cam 7 </td>
<td style="text-align: center; font-weight: bold;">Cam 8</td>
<td style="text-align: center; font-weight: bold;">Cam 9</td>
</tr>
</table>