I disagree with people saying that thermal pads aren't very nice for overclocking. Again, remember that AMD and Intel officially support thermal pads and not stuff like Artic Silver.
The thermal pad on my GlobalWin WBK38 does me no harm... 1.2GHz Athlon OCed to 1.4GHz and my processor temperature NEVER rises above 52 celcius. During normal operation (Outlook, Hauppauge TV software, and IE 5.5 open), my temperature is always around 48 or so. Granted I added some more fans to my already fan-filled case and I have a Delta sitting on my heatsink but still.
Of course Artic Silver helps knock off a few degrees but thermal pads do the trick as well.