The public relations profession and Wikipedia community have not enjoyed a productive relationship to date; antagonistic may be a more accurate adjective. For a quick overview of this situation, do take a look at my January 6th post, Reputation and Wikipedia.
For my part, I think I understand both parties' points of view and see no reason why good public relations practice (the planned and sustained effort to influence opinion and behaviour, and to be influenced similarly, in order to build mutual understanding and goodwill) shouldn't be employed to build bridges here.
The Facebook group, Corporate Representatives for Ethical Wikipedia Engagement, has quite rightly stirred the pot, raising the profile of the issues involved. For those who practice public relations according to the definition in brackets above, Wikipedia can appear a frustrating community to work with. One asks: "Why, if I know facts on Wikipedia entries relating to my organisation / client are incorrect, can't I jump in and correct them?" There are two answers to that, but firstly an update on that process of building bridges.
PR Week's Editor in Chief, Danny Rogers, called on the CIPR to clarify its guidance to members, and the profession more widely, on 18th January 2012 ("CIPR must set bar high on Wikipedia code"). Fortunately, the CIPR Social Media panel had already got its heads together to review the situation.