Just a small tip, if you use this code:
<a href="http://www.sponsor.com/t1/pps=blahblah" onMouseOver="window.status='http://www.sponsor.com/'; return true" onFocus="window.status='http://www.sponsor.com/htm'; return true" onMouseOut="window.status=''; return true">
That will still show the sponsor url when right clicking on the link (99%) in IE
