MechWarrior Online was to go into open beta last week, but it didn't happen. Piranha has announced that the open beta will start on the 29th October.
According to the developer's presser, "Infinite Game Publishing and Piranha Games announced today that MechWarrior Online is set for Open Beta next week on October 29. MechWarrior Online, one of 2012’s most anticipated titles, has been lauded by fans and the games media as the return of true mech combat. Recently the companies jointly announced that the MechWarrior Online Founder’s Program achieved more than $5 million dollars in sales since July."
Gamers interested in checking the open beta out can visit the official site.