Lindsay, A couple of researchers I have contacted to obtain data told me that they have either lost it or did not make an effort to keep it.
Having someplace that people could automatically upload their data to might help preserve more of it, as well as making life easier for other by cutting down on search time.
A while back I was asked to prepare an area on the PPIG website where people could upload data for public consumption (surrounded by appropriate caveats of course). The data I was preparing for didn't ever turn up so the area remains hidden, but I can certainly expose this in some way if people wish to use it.
-- Derek M. Jones tel: +44 (0) 1252 520 667 Knowledge Software Ltd blog:shape-of-code.coding-guidelines.com Source code analysis http://www.knosof.co.uk -- The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England & Wales and a charity registered in Scotland (SC 038302).