No. People are talking about three UI-s in this thread (hello branding confusion). The first is the MeeGo desktop (as in netbooks, maybe tablets) reference UX, which is the one that is announced for April. The second is the MeeGo mobile (as in phones) reference UX, which has no announced date yet, but I guess it should be part of the 'full' MeeGo release, which is said to be in May. The third is the Harmattan GUI, which is the Nokia customization of the MeeGo mobile reference UX, due 2010H2.