A significant portion of Intel's Core 2 lineup will be dropped by Q3 of this year. Intel will first begin the phase-out by issuing a PDN (product discontinuation notice) to all channel vendors and distributors for its Core 2 Quad Q6700 and Core 2 Duo E4700 processors later this month; these CPUs will soon after reach EOL (end of life).
The same process will occur during Q2'09 where some beloved models like the good ole' Q6600 will say goodbye. The full phase-out during this period will include the Core 2 Extreme QX9770 and QX9650, Core 2 Duo E8300, Pentium E2200 and E2180 as well as the Celeron E1200.
Come Q3, even more will be stripped from the quickly diminishing lineup with one definitive being the Core 2 Duo E7200.
More details here.