While I will see the Seacam housing for the Nikon D3 for the first time at next week's DEMA show, I did get to see the Superdome for the 14-24 last week, and am very pleased with the solution.
There is already a special Seacam dome for going ultra deep, SD Superdeep, and we have sold a few to tech divers making extreme 300 ft. + dives in caves and such. Anyway, that particular port design was reworked with a wider throat orifice to accommodate the 14-24. Known now as the Superdome ED (Extra Diameter?), it has the same external thread as all other Seacam ports. So, therefore all existing Seacam ports fit Seacam D3 housing, and unless 14-24 is going to be used, no new ports are required for those upgrading to D3. Obviously, this relates to the new D700 housing as well.
It is even possible to upgrade existing Superdomes to Superdome ED, but it means they have to go back to Austria. Still, a lot cheaper than buying a new Superdome for someone who already owns one.