I was using something else before, Feedburner I guess, I suppose I could keep using it, but it seemed limited. While using Redfin today I noticed they had the Share on Facebook with the down arrow and that it was using the AddThis.com service. Registered real quick grabbed the generated code and popped it in. Had to refer to the macro definitions for dasBlog but it seems to be working right now, the code looks like this:
<!-- ADDTHIS BUTTON BEGIN -->
<script type="text/javascript">
addthis_pub = 'YOUR USER NAME';
</script><a href="http://www.addthis.com/bookmark.php" onMouseOver="return addthis_open(this, '', '<%PermalinkUrlRaw%>', '<%itemTitleRaw%>')" onMouseOut="addthis_close()" onClick="return addthis_sendto()"><img src="http://s9.addthis.com/button1-addthis.gif" width="125" height="16" border="0" alt="" /></a><script type="text/javascript" src="http://s7.addthis.com/js/152/addthis_widget.js"></script>
<!-- ADDTHIS BUTTON BEGIN -->
This will work well for any dasBlog user just change the username, users of other services will need to figure out the permalink url and item title macro for their service.