Michael T's solution above is looking pretty good though.

When you have a small number of surfaces that meet in a crease and you want them to be smooth, you can cut away some of the area between them and use Blend to make a smooth connecting piece.

That looks like this:







So if those steps are done to Michael T's model above, it will basically fix the continuity issues there.

It looks like that may work well for this particular case.. But this is kind of moving in towards a much more difficult area of NURBS modeling and not really in the area where it is the strongest and most convenient. As your desired shape gets to be more kind of melted looking in many directions, that is usually an indication that sub-d is going to be easier for it.

- Michael