You could use an Affiliation Box to have links to specific forums on your board, although I don't think it's pretty useless, what you want.
For example, this awesome code from deathwilldie, which I slightly edited for you so to make it a little bit easier.
<!-- Affiliate Box Codeby deathwilldie from Simple Machine Codes
(
www.smcodes.smfforfree3.com)-->
<div class="tborder"><table width="100%" border="0" cellspacing="1" cellpadding="4">
<tr class="catbg"><td width="80%"><center>Affiliates</center></td>
<td width="20%">Our Code</td>
</tr>
<tr>
<td width="80%" class="windowbg2">
<marquee onmouseover="this.stop()" onmouseout="this.start()">
<a href="
BOARD_URL" target="_self"><img src="
IMAGE_URL">
</marquee>
</td>
<td class="windowbg" width="20%">
<center>
<img src='
YOUR_IMAGE_URL' border='0'/>
<br>
<script>
document.write("<textar"+"ea class='smalltext'><a href='
YOUR_FORUM_URL' target='_blank'><img src='
YOUR_IMAGE_URL'></a></textar"+"ea>")
</script>
</center>
</td></tr></table></div>
Now, change what's in red to the URL of the forum you want it to redirect to. Change what's in green to the image the member has to click to be redirected to the board. Change what's in blue to the image of your board. Change what's in teal to the URL of your board.
Note: With forum I mean a specific area. With board, I mean your whole site.
Note2: If I was not allowed to edit above post for this, then please remove this entire post, for it is not my intention to break any rules.