I fully expect the Beta launch date to be announced at E3, during the Sony conference (As Sony players get first access). This would be followed by an announcement on the Bungie.net homepage with details on the Beta, including that emails would be going out and with information on how to access the beta on the various consoles. Assuming that Bungie will have a week between the sending of emails and the launch of the Beta, to work out all the kinks and make final preparations, the Sony beta would launch on June 17th/June 18th. Access to the Sony beta is exclusive for a week as emails continue to be sent out to Xbox users, who have live access to the beta starting June 24th/25th. Both the Sony and Xbox beta then run concurrent up until Bungie Day (July 7th, 12 days after the Xbox Beta's launch), which will be the final day for the beta. This then gives Bungie more than a month to make final kinks and bug tuning before going Gold in August.