In his article Press releases: spin and propaganda, Gerry McGovern recently railed against the practice of posting press releases on web sites, asking the question:

…why do so many organizations still publish press releases prominently on their websites?

I agree in principle that putting press releases on a web site does not serve the purpose for which they were originally intended. That is, providing information to journalists for them to write stories about you (although with the advent of the social media release this might be changing).