Well, I was actually thinking of it and it would rather be a wikipedia-alike project.
We could be using own script to parse whatever site there's to parse but we would be offering the output in wikipages.
If I was a bit more regular in wikimedia community I could suggest them something like this, because this way people could join it easily and add more and more XML resources following the agreed specifications.
SF wouldn't fit our needs since there is no one and only application and we want to output information.
It's gotta be tough, but it would be fine indeed, imo.