While not yet fully integrated into their Web site, Novoflex has announced that they'll have lens mount adapters for the Fujifilm X-Pro1 camera available in June. Mounts to be adapted include Canon FD, Nikon F, Contax/Yashica, Olympus OM, Minolta MD, Pentax K, Sony Alpha (Minolta AF), and Leica M. A few medium format mounts are also apparently going to be supported.
As with a lot of mount adapters, there isn't electronic transfer of information nor is their autofocus support. However, the Nikon F, Pentax K, and Sony Alpha mounts can be ordered with an integrated aperture control ring for lenses that don't have aperture controls.