Pre-orders and previews begin April 10, launches April 24.
Apple Accidentally Leaks Specs
Removed per the request of Apple.
These specifications were posted tonight on the Apple Store (http://store.apple.com) in what appears to be (huge) mistake. The specs were listed on the order page on a single graphic. The remainder of the page was unchanged.
Within minutes, Apple's store closed down and the offending image was removed.