I've just spent some time updating the pinout documents for Balloon 3
for my own convenience and everyone else's, so I've put them on the
website linked from the Balloon 3 hardware page. They are:
http://www.balloonboard.org/hardware/300/balloon3_connector_pinouts_P1_P2.pdf
and
http://www.balloonboard.org/hardware/300/balloon3_connector_pinouts_E1.pdf

Chris
-- 
Chris Jones - chris@martin-jones.com
Martin-Jones Technology Ltd, makers of Solidlights
148 Catharine Street, Cambridge, CB1 3AR, UK
Phone +44 (0) 1223 655611 Fax +44 (0) 870 112 3908
http://www.solidlights.co.uk/