It occurred to me that the ROI question so often asked about social computing is back to front. It is asked because people have been conditioned to think that social computing is something that we have to make happen in organisations. They are trained by vendors to expect to pay obscene amounts of money for over priced, over engineered, process driven, time-wasting, life sapping tools! You can do most of what you have to do with social computing for practically nothing.
The social web is something that is going to happen anyway over time. People will start using these tools for business purposes whether we like it or not. They already are. All we have to do is not get in their way.
So next time someone asks you the ROI of social computing ask them to work out the ROI of stopping it!