Some questions so we can get this service up:
How long and how many dumps do we want to keep for starters?
What directory structure do we want?
What about metadata such as md5sums for downloaders?
Should there be an RSS feed announcing the latest complete run of a given wiki? Do we run them daily, weekly?
How often do we run from scratch and how often do we update?
Would we ever want to dump more than just ns0 and project/portal namespaces?