StarCraft.IncGamers.com continues on their StarCraft 2 Preview Series, and focus on the mutations of the Zerg race:
"If you take the time to think for a minute; What is the Zerg most known for? Most people would say the infamous "Zerg rush", and MMO-players would say "Zerging", the word never used by the actual Zerg-players... Another famous Zerg attribute is the ever-changing mutations and infestations!".
They take a closer look at the Baneling and the Lurker, as well as going back to the Hive Queen and Overseer.