During Sony’s E3 2010 press conference which wrapped up earlier today, the company officially announced and detailed a PlayStation Network subscription service called PlayStation Plus.

Available starting June 29th, PS3 owners will be able to join PlayStation Plus to receive “a whole host of premium and exclusive features, including games and content” worth roughly $300 a year, as well as “member only PSN features and much more.”

A subscription for one year will cost $49.99, or three months for $17.99.

Have a look at the peppy trailer for PlayStation Plus below:

PlayStation Plus Trailer

Here are some features of PlayStation Plus:

• Games: enjoy loads of PlayStation Network games, minis and PS one classics plus premium avatars and dynamic themes. You’ll also get exclusive PlayStation Store discounts and early access to demos and beta trials. Content is updated every month on PlayStation Store, so there will always be something new to enjoy.
  
• Full Game Trial: try before you buy with a one-hour trial of selected PlayStation Network titles and Blu-ray Disc releases.
• Automatic Download: receive the latest PS3 system software updates, all your game updates and even game demos without lifting a finger.

(Note: * Approximate value based on average RRP of available content, excluding discounts, calculated using exchange rates as at May 2010. Actual value may vary. Access to some content, excluding discounted content, terminates at the end of the subscription period.)

You can check out the official PlayStation Plus website over here.