Some excellent clips and comments here - thanks to all.

Let me keep the pot boiling with a couple more examples of the hornpipe. The first one is a lovely one called:

The New Century Hornpipe

which I got from the playing of Norman Blake. The second is a bent and perverted version of "Staten Island". There's a great version of this played on two high whistles in D by Hamish Moore and Dick Lee on their album "The Bees Knees". I've taken it a step further and called it:

Staten Island Steps