Sorry. I was a way off on that one. What I meant to write was:

get_property(g, p)

where property is a property tag like vertex_index or edge_weight. It uses the same mechanism as get(g, p) for getting property maps over vertex or edge properties. None of the graph classes or adapters support bundled graph properties there's a ticket filed.

There's an example (sort of) of this in libs/graph/test/graphviz.cpp. The graph is constructed (more or less) as:
 
typedef property<vertex_name_t, string,
  property<vertex_color_t, float> > vertex_p;
typedef property<edge_weight_t, float> edge_p;
typedef property<graph_name_t, string> graph_p
typedef adjacency_list<vecS, vecS, directedS, vertex_p, edge_p, graph_p> graph_t;

And used as (again, more or less):

dynamic_properties dp;
property_map<graph_t, graph_name>::type gn =
  get_property(g, graph_name);
dp.property(g);

Graph properties have never really been thoroughly evaluated (or documented). There just haven't been that many people that really seemed to use them. Unfortunately, when people were asking, there wasn't a lot of forward momentum on BGL development.