In the interests of all-that-is-agile, and the HolidaySeason™ I took a
quick (imperfect) stab at providing some basic suggest functionality
at id.loc.gov which you can find documented in the OpenSearch
Description:

  http://id.loc.gov/authorities/opensearch/

I used the OpenSearch Suggestions extension defined at:

  http://www.opensearch.org/Specifications/OpenSearch/Extensions/Suggestions/1.1

For example:

  curl http://id.loc.gov/authorities/suggest/?q=folklore

Or with an offset:

  curl "http://id.loc.gov/authorities/suggest/?q=folklore&offset=50"

It's something to throw darts at. Comments, questions, suggestions
(ahem) welcome :-)

//Ed