Squads and Voicecom
Each side can have their team broken down into squads. A Squad leader can give order too his squad or request orders from the Commander (more about that very cool feature later).
As a player you can see little arrows telling you where the rest of your squad is and so on. Your buddys also show up on the minimap. The Squad system might improve gaming on public servers, making it easier to cooperate with other players.
DICE has implemented Voice over IP in the game, so there´s no need for thirdparty software for communications anymore. The Voicecom follows the chain of command: Squad leaders can communicate with other squad leaders and with the commander. The average grunt will only hear his own squad. To tell you the truth we didn't pay a lot of attention to the Voicecom thingy as we were sitting next to each other and could just yell at each other instead. That said, it did look and sound like a solid system. It will be interesting to see how it will be used on public servers...