The PlanetSide 2 beta has been delayed by a few days according to a tweet from SOE president John Smedley. The delay isn't a monumental one though. He tweeted, "Beta likely going to start Friday or Monday."
The beta was originally planned for this week but they have "some stuff [they] need to make sure is awesome," before the beta goes live.
PlanetSide 2 is a first-person shooter MMO from Sony Online Entertainment. It's not too late to apply for the beta, just head over to the Planetside 2 official site.
Source: The Verge