@tclemens here a link about some Sub D talks maybe that could be interesting for you John moved this to another thread in case this may be confusing. anyway here the link
i have not tried it hoping this will make its way into the mac version once it gets moved on.
i am also not sure if this will be released in the final windows version at all but this it at least a direction which could fulfill a wish of many i assume, even though i personally would enjoy seeing something going more in the direction of NURBS rather than polygons.