According to: the451groupblog  Ubuntu is going to support OpenStack. Eucalyptus will still be supported but I belief such a statment means that most of the devlopment / integration efforts will be put into OpenStack, The title chosen by 451 group "Ubuntu broadening cloud coverage" could be right in terms of a deal setup with Vmware's Cloudfoundry and Ubuntu 11.10, but I am not sure Eucalyptus will servive the test of time, I guess we will have to wait and see ...

A few quotes from the blog post: