According to the Register Ericsson is not happy with the poor performance of the Sony/Ericsson joint venture with sales dropping 30% :(. They are threatening to stop their funding unless it performs better. It looks like the P800 could be crucial to their future, though I'm not sure if the P800 will have a big enough mass market appeal to offset the poor sales of its everyday phones. However as the Register mentions its unlikely that Sony would drop the venture even if Ericsson did drop out.