Intel plans to get rid of quite a few CPUs including X6800, E6600, E6700 and E6300. The customers will get Product discontinuation notice in Q4 and there wont be any of these CPUs in Q1 2008 and on.
Intel will replace this one with X6850 and other X6x50 series as they should benefit from FSB 1333.
Intel will also discontinue E6340 and E6320. Quad core QX6700 is getting discontinued in November this year and the Product discontinuation notice will be sent in September. That is the time fo death of Pentium D 945 as well.