The PlayStation Blog in Europe announced that they'll be giving 70 days of PlayStation Plus membership for free as part of their welcome back package. This will only go into affect to to users who were members of Plus before April 21.
All the content that was released in April will still be available to users for the next two weeks and there's also some new content out too. Burnout Paradise, Magic: The Gathering and Streets of Rage 2 are available along with a bunch of other games and tons of discounts detail on PS Blog.
No word as of yet if the 30 days of free service for PS Plus users in the United States will be extended.