" Google has taken action on a "large guest blog network" .
In January, Matt warned that guest blogging for SEO is dead, which caused a major stir in the community.
Since then, many said guest blogging has continued to work and lead to great rankings.
Google went after a larger guest blogging network, which may result in lost rankings, penalties and unnatural link notifications. I have to assume that Google will continue to go after these networks.
What if you just do occasional guest blogging? You should be fine but again, with the caveat that it is not done for SEO purposes. Personally, I hate guest blogging but I have the luxury at writing at two sites that have a large audience already.
Matt Cutts :
" Today we took action on a large guest blog network. A reminder about the spam risks of guest blogging" : goo.gl/cnkoFA http://
We stop to consider links in the rankings for commercial requests. Implementation of this change occurs in stages. In the first phase change will affect ranking queries in the Moscow region on a number of commercial topics, such as, for example, real estate, tourism, electronics and household appliances. Later changes will spread to other subjects. We hope that the resources that were used to manipulate the links will now be directed to a real improvement in the quality of the site. Ultimately, this will benefit both users and businesses, and search engines.