ipoque claim their prx traffic manager can detect and, if necessary prevent, skype 3.0 traffic:-
quote:
on november 9 the brand new beta version of skype 3.0 has been released. experts keep emphasizing the vulnerabilities of the popular program pointing out the potential security risks. in addition, the use of skype in a corporate network significantly increases the traffic volume thus interfering with other mission-critical applications. to help companies alleviate these risks, ipoque has immediately updated its prx traffic managers, which are now capable to detect and – if necessary – block the latest skype version.
http://www.ipoque.com/en/pressrelease_i ... 41106.html