Excluding the very low end, Intel will be introducing the Core 2 Duo SU4000 and SU7000, in addition to a dual core Celeron, the SU3000. These will stand apart from the Atom offerings Intel has planned for netbooks and the Pine Trail platform, and will target a market demanding higher performance in a mobile environment. Still, Intel is keeping an entry-level option for ultra-thins: the Celeron 700, though it's unlikely to directly compete with Atom-based devices. At the very high end, Intel will be keeping the existing Core 2 Duo SU9000.
These changes are due before the end of this year, which will be nice for people who want portability but are not necessarily willing to sacrifice performance.