http://www.solidworks.com/pages/products/solutions/Rhino-to-SolidWorks.html
- which means you can edit the geometry by just changing the values of dimensions.
If drawings have been created based on the 3D model, they will update automatically if the model changes.
The concept is quite powerfull, but it takes a bit of experience to build proper models that won't "auto-destruct" if any change is made.
Someone wrote on the newsgroup that modeling in SolidWorks is a bit like programming : if the work is well structured and documented, it can do all sorts of things.
If not, It can become a nightmare.
I love this software, and I think it's the perfect complement to Rhino.
Yet, other similar CADs exist and I'm sure they are good too : SolidEdge, Inventor...