Also, y'all should be aware that in order for Wikipaedia to qualify as an innocent disseminater under the United Kingdom's Defamation Act 1996, the following criteria must be met:
(1) In defamation proceedings a person has a defence if he shows that— (a) he was not the author, editor or publisher of the statement complained of, (b) he took reasonable care in relation to its publication, and (c) he did not know, and had no reason to believe, that what he did caused or contributed to the publication of a defamatory statement.
The full text of the Defamation Act 1996 can be found here: http://www.opsi.gov.uk/acts/acts1996/1996031.htm
Note that the third criteria is not met if Wikipaedia is informed of the defamatory material, asked to remove it, and fails to do so.
Disclaimer: Not a lawyer, not threatening to sue y'all, just letting you know....