According to Joystiq’s sources, this year’s E3 will see Sony introduce a premium subscription service to the PlayStation Network. Dubbed PSN+, the service is said to differ from Microsoft’s Xbox Live Gold in that PSN+ will offer subscribers new features instead of stripping them away from non-paying users. Some of the features Joystiq has been told will be included in PSN+ include exclusive downloadable content, cross-game voice chat, a back catalogue of Classic PSX and PSP Minis titles, discounts in the PlayStation Store, and one hour demos of retail titles. One other major perk is said to be the automatic enrolment in the PlayStation Protection Plan. Rumored to becoming shortly after launch of PSN+ is the ability to save games to the cloud. Specifics about when the service will roll out and how much it cost aren’t all that clear, but it’s believed the cost will be around $9.99 per month.