By law NSF must make the abstracts of all funded proposals public.
They have a search tool for exploring awards: [link][1].  You can look for every proposal that
includes, say, _knot_ in its title (there are 29 active awards, not all in mathematics!).  Etc.
[Sorry to repeat what you knew, as indicated in your final note.]
 
  [1]: http://www.nsf.gov/awardsearch/