Maria Langer, no doubt familiar to regular commenters on this site, has created a new Yahoo group for authors entitled “Authors Against Piracy”
The invite-only group is targeted at published authors to discuss “how authors and publishers can prevent electronic publications from being freely distributed by software pirates and pirate Web sites.”
If you wish to join this group, you need to contact Maria and introduce yourself, being sure to include your most recently published work. Other than those requirements, membership is free.
Also, be sure to take a look at her post about ebooks, which contains the information about the group in the callout as well as some background information on the problem.
If you are a blogger or Webmaster and wanting to discuss legal issues faced by them, be sure to visit the Performancing Legal Issues Forum where I am offering assistance for free.