Amateurs helped plan New Horizons Jupiter encounter

A recent press briefing on NASA TV by the New Horizons team explained
how amateurs had assisted in their targeting as the spacecraft approaches
Jupiter. Here is an audio recording of that briefing for anyone who missed it:

http://www.cafesociety.uk.com/other/...ns-Jupiter.mp3
(right-click on the link and select "Save Target As..." to download.