No, to my knowledge the copies people have of it now are Pirated.
Incorrect, good sir. Release date was March 17th, and my hardcopy from Amazon arrived this morning. Mmmm, new book smell.
It was available at many Barnes and Nobles on Monday.
On Tuesday it'll be added to the Character Builder, for subscribers to DDI.
Avengers are Divine Strikers.
Barbarians are Primal Strikers.
Bards are Arcane Leaders.
Druids are Primal Controllers.
Invokers are Divine Controllers.
Shamans are Primal Leaders.
Sorcerers are Arcane Strikers. - Much blastier than Warlocks.
Wardens are Primal Defenders.
No new martial classes.