Well, either one of two things has happened

 

  1. The comment spammer has finished this cycle of spamming and gone away
  2. My .zip file of death has annoyed him enough to give up.

Since i changed my wp-comments file to write back 47MB zip file, I haven’t had a single comment spam attempt. 

Don’t worry, you won’t get the file, I’ve made sure thats okay.

Anybody else have a similar experience?