Max read speed is quoted as 260MB/sec, but the most interesting point is the random write speed of " upto 75MB/sec " !
At the heart of the new G-Monster is the SandForce SF-1500 controller, so as you'd expect this is not a budget SSD... price for 100GB starting at 74,800 YEN ($830 USD!!) . We can't imagine what they'll ask for the 400GB... [you'll have to wait till March for that one]
for more, over to Photofast
a few benchmarks there