Using USING in Fuseki?

[Bob DuCharme]

I was hoping to get the following query working on the the SPARQL Update 
panel in the 11 March build of Fuseki 0.2:

  INSERT
  { <http://rdf.freebase.com/ns/en.miles_davis> ?p ?o }
  USING <http://rdf.freebase.com/ns/en.miles_davis>
  WHERE
  { <http://rdf.freebase.com/ns/en.miles_davis> ?p ?o }
Fuseki tells me that "Update succeeded", but there are no new triples in 
the default graph.

Because the Update spec describes USING as being similar to FROM, I 
tried this query:

  CONSTRUCT
  { <http://rdf.freebase.com/ns/en.miles_davis> ?p ?o }
  FROM <http://rdf.freebase.com/ns/en.miles_davis>
  WHERE
  { <http://rdf.freebase.com/ns/en.miles_davis> ?p ?o }

It retrieved several hundred triples when I ran it with ARQ, but when I 
entered it in Fuseki's SPARQL Query panel, I got "Error 400: Query may 
not include a dataset description (FROM/FROM NAMED)"

Am I misunderstanding how this should work, or is this kind of retrieval 
from other data sources just not supported by Fuseki yet?

thanks,

Bob