I agree that wiki is probably not the best platform for this. I thought years ago Twitter, with the appropriate search capabilities, could serve this niche. In my experience, it hasn't.

It would be interesting to have a service that could gather together (effectively gather together, with the perfect magical user interface on the other side) a bunch of disparate municipal public data: crime blotter stuff, business filings, real estate transactions, city council actions, what have you. Anybody else curious about this stuff?