Intel's original roadmap showed that the 45nm Intel Penryn processors will be used in what is known internally as the Santa Rosa refresh. However, our sources says that is not likely to happen for two reasons.
"Intel has apparently decided as well that it does not make marketing sense to introduce a Santa Rosa refresh in Q1'08 when the next-generation Cantiga chipset will be released just 3 months later."
Source: TechARP