i've started development of the node relations module, i called it nodefamily module. As the module might be useful not only for profile nodes, I've written it generally, so that it may be used without nodeprofiles at all.
As i noted in the proposal I need a node relationship, which offers views integration. The views integration I 've in mind is that it's not only possible to display a link to a related node in a view, like it is with CCK node relations, instead it should be possible to list concrete data (e.g. CCK fields) of the related node.