Medium = Message. There isn't much buzzing yet at www.abuzz.com, the community site launched last week by Times Co. Digital (a division of The New York Times Co.). But the site likely will spark discussion in the trade press about the future role of media companies, considering it's a media venture in which the media is noticeably absent. Abuzz.com provides a technological platform in which users can post their own profiles, pitch their own expertise and solicit the perspectives of other site users - without filters (a.k.a. reporters, advertisers or PR practitioners).