My relationship with Facebook isn't love/hate so much as mild indifference/hate. I've had an account for 5 years now (I signed up right after finishing my finals), but I honestly can't say that it has in any way changed my life. I normally only log in when I receive an email notification of some activity involving me (a message, or an event invitation), but I've kept my account because several of my old school friends seem to use it as their primary means of communication. My profile is definitely a social and not professional one. Not that I post the details of my weekend (tea and knitting) benders, but it's more light-hearted than I would perhaps desire for a professional presence.
Several other Cam23 bloggers have noted the difficulty of keeping the personal and the professional separate on Facebook. The system of 'friends' is monolithic - there's no option to have some people as 'colleagues' and others as 'bosom pals', as is discussed (at some length) in this week's number one Cam23 slideshow (brought to my attention by Ange Fitzpatrick). Do note that this presentation was produced by Google, who, we are told, feel threatened by Facebook's increasing online dominance.
@angefitzpatrick, I found this blog post about a satire on these pointless, addictive (so I'm told) social 'games'. (I'll admit that there are some useful apps, too, such as the libraries@cambridge one, and COPAC, but more on that later.)
Having had a look at the various Cambridge libraries Facebook pages, I can see that they could be useful in communicating with users. A Facebook presence provides another means by which the library can be contacted. But this is only of benefit if queries are answered quickly. A library page on Facebook showing unanswered questions on its 'wall' will be worse for impressions of the library than not having the page at all. Once again, these social media tools seem to be good only if there are sufficient resources available to moniter and maintain them.
While I have no real criticisms about the library pages I visited, none of them (either specific or general) grabbed me enough to 'like' them or to join them. This is partly because I'm not much of a joiner, but also, I think, because of the way Facebook looks and works. Everything looks the same all over Facebook, whether it's the homepage, a personal profile page, a group, a fan page or an app page. Andy Priestner has described this as 'ridiculously restrictive architecture', and limits on what can be done have been noted by others. I tend to feel that the Facebook page (even with its status updates) doesn't offer enough above a library webpage that I want to stick my colours to its mast.