After announcing plans to discontinue mobile processors with previous-generation processor system bus speed-bin, Intel reminded its customers that the company's 852- and 855-series of mobile core-logic sets are also scheduled for phasing out.
Intel 855PM, Intel 855GM, Intel 855GME, Intel 852GME, Intel 852GMV, Intel 852PM and Intel 852GM memory controller hubs (MCHs) as well as supporting I/O controller hubs (ICHs) will be unavailable for orders after the 25th of November, 2006. The last product shipment date is scheduled for the 21st April, 2006. All of those products supports only 400MHz processor system bus and does not sport PCI Express interconnection.
News source: X-bit labs