Freebase - improving the mapping of freebase rdf to other vocabularies

I just made:
http://foaf-rdf.freebaseapps.com/?id=/guid/9202a8c04000641f8000000007629191

Its a really trivial application to say that I'm a foaf:Person and point to
the main RDF from freebase.

The source is just a mix of javascript, rdf, and a few extra tags - really
easy stuff.
http://acre.freebase.com/#app=/user/doconnor/foaf&file=index

Without going overboard:

   1. What other common vocabularies would related to freebase types well;
   and be of value to publish?
   2. What more complicated queries would be neat to have as RDF? (rather
   than 'show a single object')