Would you like an archive of PPIG workshop proceedings? I have the printed proceedings for 10 workshops:
1992, 1995 - 2003 I've also got about 14 papers from 1990 given out at the workshops. They're available to anyone as long as you pay for delivery (they weigh 13 lbs / 5.9 kg unpacked). UK: £10 Europe: ~£23 USA: £43 Paola -- http://www.paolability.com/