I’ve added a new tool to the site that will replace the “math question” plugin. It’s called “reCaptcha” and is administered by Carnegie Mellon University. Normally I wouldn’t devote a whole blog post to a spam fighter, but this one is interesting. You see, every time you post a comment on a site that uses this, and type out one of the word images, you’re helping to digitize a book for the Open Library. Ain’t that cool?

You can learn more about reCaptcha here.

Or you can take a look at the Open Library project .