Automatic spam tool can post 1100 posts to websites, forums, and blogs in under 15 minutes.
http://www.net-security.org/secworld.php?id=5370
[Editor's Note (Valle): The disturbing thing is that this tool can read even difficult to decipher CATCHA systems. As more 2.0 technologies and websites depend on user feedback and content creation, this sort of spam issue has the potential to seriously cripple their value proposition.]