Nibbleblog use Defensio http://defensio.com to control the spam in comments.
To use the spam monitor you need a KEY from Defensio.com.
Note: If you are using another system comments such as Disqus or Facebook Comments you don't need this feature.
How to get the API KEY
- Go to http://defensio.com
- Sing up
- Login and go to My API Keys
- Go to protect another web property
- Select "A blog or website"
- Complete the form with your Blog URL
- Copy the key on your blog