Facebook maybe isn't the ideal vehicle for this kind of project per se; it's great for keeping in touch with elements of my extended family, but I'm not sure about it as a vehicle for informed debate.
There is a lot more that could be done using twitter, Facebook and the like to push information to anyone who's interested in what we do, but I'm not sure it's an evidence collection tool. So it could be good as a way of announcing a review, or of publicizing a meeting, but I think that would be its limits.
I think there probably is a need for a family of scrutiny related internet projects. The problem with the CfPS forum is that it isn't an everyday visit for me; when I'm at work I don't always have the time, and when I'm at home I'll be on one of the sites that represent my main interests outside work. (www.gwladrugby.com
, or on eBay trying to find another cheap guitar...)
A blog / guest blogging / intermedia project called 'the scrutineer' might be interesting; I've thought about it myself, maybe modelled on http://www.citymayors.com/
or something similar. The objective would be to try and do two things at once; project the image of scrutiny as a profession outwards and also provide a reference point for local government professionals who're interested in scrutiny as well as for ourselves. Obviously that would be a major project, but it would probably fit with the debate about 'is scrutiny a profession'. Maybe if I can find a good cheap CMS and some design skills I might invest in some hosting and come back to that idea...
To come back to the original point though, I think it boils down to the push / pull technologies debate. Facebook and Twitter could be really good ways of pushing information out to people (John Prescott's campaign on Facebook, which I believe is guided by Alex 'Recess Monkey' Hilton is a good example of push campaigning via social networking sites) but in terms of puilling evidence in I think it's limited - the same probably goes for twitter.