A related and remarkable resource, which is less a Wiki and more of a
blog, is Paul McJones' "Dusty Decks" page:
http://www.mcjones.org/dustydecks/
He does a very excellent job of tying together multiple resources
around the web, relating them to real computer history of wide general
interest.
Paul brings together several ingredients here:
1. A genuine interest in computer and especially software history in
the context of the entire industry.
2. Knowledge of many others around the world who are doing solid work
on the subject, including collecting/storing/making available hardcopy
documents, reading old media, emulating old systems, etc.
3. Links to the others who are doing the work, often showing the output
of the work.
4. A blog-type format that show shis personal interest but also shows
that the work being done is relevant and important.
5. Incorporating comments/replies/etc. into his page.
This is so monumentally great and exactly what should be done at this
point in computer/software/emulation history, taking advantage of the
web in exactly the right way.
I should point out that there are some more scholarly and museum-like
efforts going on at the same time, but none present the work and details
and results nearly as openly and vividly as Paul does.
Tim.