I'd hate to sound like an Intel Fanboy(as I am most definitely not) but hands up who remembers the T-bred 'A's?
Intel apparently had a similar problem with the .13 micron process but kept it in the labs, it seems to be coming with every process now(ATI's .15 R300 started at email@example.com
v, within months they were spewing out firstname.lastname@example.org
v capable cards)
I believe prescott's heat problems will be solved with the next stepping, which Intel is proberbly rushing to finish now.
on a different topic, has anyone got any of those W/cm^3 figures comparing CPUs to nuclear explosions? I think one would be very appropriate here