The San Andreas Anniversary Weekend is now live in GTA V's online mode and runs through October 26. This consists in part of a new limited-time playlist, San Andreas Throwback Jobs, that offers fan-created missions with callbacks to San Andreas. (A list of the missions is available here.) By participating in the playlist, you'll earn double RP and GTA$, similar to past events.
With a statement on its website, developer Rockstar recently made it abundantly clear that no pre-release Beta test is scheduled for Grand Theft Auto V on newer consoles and PC.