Update - Added additional details on the service.
We've been hearing rumblings of a "Premium" service coming to Battlefield 3, and it seems that the rumors have been on to something. Sony inadvertently let the cat out of the bag, revealing what could be the date and price for the service.
A European PlayStation Store update (via Eurogamer) listed the service, but quickly removed that part of the post. It had been listed for a June 4 launch, at 49.99 euros (approximately $62). EA has not yet made an official announcement.
The date may vary since it's the European release, and we imagine the US price will be set at $50 or $60. The date does fit with the rumor we had heard earlier, so it's been accurate as far as we know up to this point. The reports have stated the service will include a premium knife, black dog tag, soldier camos, weapon camos, extra Assignments, and more.
A German fact sheet on NeoGAF (via Joystiq) gives more details. It claims a one-time fee of $50, and the inclusion for five expansion packs, plus two weeks of early access to unreleased packs. Other promised features on the fact sheet include "the ability to reset stats" and "queue priority into servers." With so many leaks, we expect an official announcement soon.