I think that the Hogsbreath record is about 5 hrs and 11 minutes by Matt Struble and Wf Oliver on a Tornado.
As far as long distance record, during the early 1990's a Stilletto 23 sailed in the "Low Rent Regatta" which is a 23 nautical mile+ race. The S-23 finished in 1hour and 2 minutes, so they averaged about 22knts?? The winds in that race were so high that most of the participants on hand for the Nacra Nationals, including high wind expert Chris Christenson (sp) choose to stay off the trapeze in order to stay on the boat in the Chesapeake Bay Chop.