This will probably be officially announced in the stream that's going up a couple of hours from now. Speeds are 7000MB/s for Sequential Read and 4100MB/s, 5300MB/s and 5100MB/s for Sequential Write in the 500GB, 1TB and 2TB respectively.
Prices are $149.99 for 500GB, $229.99 for 1TB and $449.99 for 2TB. These prices will surely go down as time goes by like every single drive does.
Price seem about right but the 500GB look kind of over priced.