I'd like to enable commenting on this blog, but I've seen blogs flooded with spam in the past.
Due to my work and other commitments, I can't monitor the blog constantly to filter out spam.
Can anybody suggest a viable solution? Should I ask people to register by SMS, like getting a Facebook account? Should I try the Mollom network-based service discussed in the Drupal site? Will Captchas cause more frustration than adding value?
Update 14 March: I've now enabled unmoderated comments so people can reply easily
If you have an OpenID, click "Log In", and if you want to comment without OpenID, click "Register". I've also raised a bug report because the Drupal blog module should not have been displaying those links and causing people frustration when user registration was completely disabled.