Nat Arem who was instrumental to uncovering the facts of the AP breach was invited by AP to visit their HQ in Costa Rica. PokerNews.com sent him and they are publishing the debriefing interview. Part 1.
PN: How was the cheating done?
NA: ...However, the method used to gain hole-card access was described to me as a backend tool called "Servman" that wrote the hand histories before hands were completed...
Plenty of other nuggets-o-info in the article.