Using Twitter for Health Impact Assessment?

I've contributed to a post over on Croakey about using Twitter for public health advocacy. Its emphasis is on the use of Twitter for general health/public health but it made me wonder if Twitter could have some specific applications in relation to HIA?

Twitter might help to make information more accessible to stakeholders, or to elicit additional views as part of consultation. But could it have additional uses?

I'd be interested in hearing your thoughts.