Actually, FormZ has been able to convert polys to nurbs for many years. When it was introduced, I think around 2005 or 2006, they were calling it the reengineer tool. Unfortunately, it has been very limited in the # of polys it could handle, even more limited than T-Splines or Power Subd Nurbs. Perhaps this has been improved in v8.

Lofting to a point may not be possible, at least it was not in the version I have, there but there are other functions in FormZ that can handle this. The "Convergence" and "Skin" functions will generate geometry ending at a point.