After relentless spamming over the last few weeks (hundred spam comments per day), the site has received a major overhaul under the hood. You should not see much of a difference, but life will be considerably easier for me. I am still experimenting with different CAPTCHAs, which work to varying degrees. If you have trouble submitting comments, please do not hesitate to use the contact form and describe what you are doing and what response you are getting.

Drupal's CAPTCHA module is not quite working correctly, which is quite annoying because it is such an important
function. There are alternatives though, one of them being the rather brilliant reCAPTCHA: prove you're human and help digitize books at the same time. Visualization is all about machine-supported human cognition, so this makes perfect sense.