The Roach, a new Zerg ground unit, is an excellent front-line soldier and a powerful component of many Zerg strategies. Cheap with high HP and good damage, the Roach is powerful against many tier one units like Marines, Zealots and Zerglings, and strong against armor.
Not only is the Starcraft 2 now in beta, but a release date has been set, so all the more reason to get familiar with the changes the races have undergone. The Zerg maintain their extremely quick rushing ability and massing potential, but with a number of new units and mechanic changes. Take a look.