Social networking? Or will my users be bothered?

After watching the rise of digg and technorati and all the site's that require feedback, it seems sad when some people try this and its not as successful as it wished. For example, over on Ubiquitous Librarian blog, he was discussing how he set up an internal wiki, which just has not taken off. The problem is not usually the technology or the training that scare's people, its they don't always see its relevance or even worst, there suffering burnout from having too many social cataloguing sites...... I'm really a fan boy of the social networks sites, but people are really finding it hard to keep up with this stuff.......oh, well another rant from me, but I do hope that Brian does get the wiki up and running, sounds a great project.