It seems that splogs (spam blogs) are still a major issue in the blogosphere, at least according to Automattic founder Matt Mullenweg.
Mullenweg told the Future of Web Apps conference (via WebProNews) that its Wordpress software has deleted more than 800,000 splogs, calling spammers "the terrorists of Web 2.0".
The Wordpress platform powers 2.5m blogs, so that 800,000 figure equates to more than 30% of those sites. If this is representative of all blogging platforms, then this is clearly a major problem.
Spam blogs are automated blogs that simply lift the extract from an RSS feed and re-publish with a link, using the stolen content to climb up the search rankings and often cash in with AdSense ads.
Estimates of the size of the problem also vary widely - Technorati boss Dave Sifry raised more than a few eyebrows recently when he said splogs accounted for 99% of the content it tracks.
Technorati hasn't updated its State of the Blogosphere report for a while now, but the last update in April 2007 claimed that between 3,000 and 7,000 of the 120,000 new blogs it was indexing daily were spam.
But whatever the true figures, it's good to see Wordpress' creators taking some steps to deal with the issue.