same basic principles, increase FSB speed and compensate instability by raising vcore where necessary...the only differences would be LDT ratios and the onboard memory controller vs. north bridge memory controller which might require more northbridge voltage on C2 boards for memory overclocking
intel's are great overclocking without raising voltage like pentium. but the netburst architecture sucks so not many people pay attention to them but i think the story is change for the release of conroe