From various reports including this one from IMG, the Chinese have made some last minute changes that require an all Tibetan Staff (porters, cooks, climbing support e.g. 'Sherpas') for Fall 2008 Cho Oyu expeditions. Also they required that all expeditions submit their passports to the Chinese Embassy in Kathmandu which is then sent to Tibet (I assume Lhasa and the CTMA). Then their visas will be issued.
All this means delays for climbers and serious uncertainty for both climbers and operators. Most operators have developed relationships with Nepalese Sherpa and Staff for many,. many years and now it appears that they cannot employ them for Chinese expeditions. This will be a huge blow to the livelihood of these individuals.
All this will have serious impact on climbs to Shisha Pangma, Cho Oyu and Everest - north. I also understand that it is now official that Everest North will be closed for cleaning in the spring of 2009.