Seti likes the extra cache - and the Prescott shines when overclocked.
I've put together two 2.8e system and oc'd them.
During burn in here they were both running smooth at 3.6ghz and producing 24 WU's / day.
Good cooling is a must, as they do run warmer than the Nwood.
I've got them running @ 3.3 / 3.4ghz at the clients site, and there's never a problem.
They have air pulling in the side of the case over the cpu & air evacuation out the back of the case at both the PSU & a case fan. Plus a good quality HSF and they do just fine.
This client does keep his office pretty cool, but even when I found he had one of them pushed up against a baseboard heater it didn't complain. Of course I moved it & explained to him why that was a bad idea...