You're not paying attention close enough. For starters, my name is Toby. Secondly, I have cited some case studies previously - do a search on 1Up.com and Placemaking (two stories on how wikis have saved significant money at two small companies). Finally, I've seen the Cisco spreadsheet on their ROI and its impressive -- and it is millions. While you're entitled to your opinion, you're wrong that any of these are assumptions. So, no, its not hype, but reality and I've not missed the point as I've written dozens of articles on the subject and they're all available here or via link on this site.