Yesterday evening, I sat through a live webinar from the creators of a popular article spinning service, who were now pitching another service of theirs to push out press releases from your site to hundreds (or perhaps thousands) of different sources, comparable to services like PRWeb which cost much more. They argued that this method is much more effective than traditional link building and showed a number of examples where they were able to in effect piggyback on the authority of higher traffic news sources, to indirectly get top rankings. In other words, instead of trying to get their site directly listed on the first page of Google SERPS, the press releases they were issuing were getting picked up by popular news sources who in turn were getting first page and/or top rankings for a given search query you may be targeting. So it's not a "direct" top listing in Google - the news site itself would be ranking #1, but when the visitor goes to that article, they will see you mentioned in the article and possibly visit your site. Of course this all sounded too good to be true, and after doing a little research on some of the popular marketing blogs, I saw some mentions that Google had been cracking down on press release spam as far back as a year ago. Can any of you confirm if this method is even still remotely effective?