Ocing my 3000+ Winnie from 1.8Ghz to 2.4Ghz with the stock Aluminum HSF. Runs about 35*C at idle and 52*C at 100% load (Prime Torture test, Large FFT's, max heat).
I am actually stable at 2.53 Gig also, but since I can run at 2.4G with all default voltages i use that instead.