1. do nothing (it acutally converts on some of my blogs but not at all)
2. redirect it
3. kill frame (so user can't go back to google and he stays on your site with code below)
Code:
<script type="text/javascript">
setTimeout('brakef()', 1500);
function brakef() {
if (window.top!=window.self) {
window.top.location=self.location;
}
}
</script>
the timeout settings is set to 1500 and thats 1,5 seconds (it's in milliseconds so 1000 is = 1s)