Nice idea. Installed.
Only thing I did was changed the template so the sideblock followed the same formatting as the other blocks.
Code:
<!---Flash Music Player--->
<div class="block">
<div class="visitors">
<h5 class="blocksubhead smaller">Your Title</h5>
<div class="blockbody">
<div class="blockrow">
<div class="meta">
<li>
<center><tbody><tr>
<if condition="$userinfo['fieldXX']"><td class="alt1" style="font-family: Verdana; font-size: 10pt">
<script src="{vb:raw vboptions.bburl}/embed/swfobject.js" type="text/javascript"></script>
<div id="player"></div>
<script type="text/javascript">
var so = new SWFObject('{vb:raw vboptions.bburl}/embed/player.swf','mpl','170','20','9');
so.addParam('allowscriptaccess','always');
so.addParam('allowfullscreen','true');
so.addParam('flashvars','&file={vb:raw userinfo.fieldXX}&volume=100&autostart=true');
so.write('player');
</script>
</td>
</tr>
</tbody></center>
</div>
</div>
</div>
</div>
</div>
<div class="underblock"></div>
<!---Flash Music Player--->