This shouldn't come as a big surprise -- especially in light of Honeycomb's support and the presence of a front camera on the Nexus S -- but Google has just announced that Android 2.3.4 includes Google Talk video and voice calling. As you might expect, it works with any type of Google Talk-running device on the other end (tablet, PC, so on) and will be coming to the Nexus S first before rolling out to other Gingerbread phones in the future. Look for the update "in the next few weeks."