Erik,
Thanks for re-starting this thread!
It seems there are two main questions:
What would be the uses of readership data in the various forms that are
potentially available?
-and-
How could privacy concerns best be balanced and addressed in the context of
those potential uses?
I have access, for starters, to .2TB of disk that could be devoted to readership
data; it seems storage and other technical hurdles could be overcome if there is
consensus about what data the community wants stored, with what privacy
guarantees, to what end.
There's some discussion of these questions at
http://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikidemia/Quant/Readersh…
http://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikidemia/Quant/Security,
and further contributions to these pages would be more than welcome;
the Thursday afternoon session at Hacking Days (ie, a week from tomorrow) will
hopefully press forward to some (at least interim) solution.
Jeremy