Looks like their site is up. Didn't work the first time.
55nm chip, so definitely within the realm of possibility.
That's interesting. If they did implement the SRAM on chip, I guess the could maximally fit 14 scratchpads (14 x 128 KB). If with 8 they could reach 84 KH/s at let's say a theoretical 0.750 W, we'd max out on a single chip at 147 KH/s and 1.3 W. Not too shabby if these only cost about $5-10 each to produce on 55 nm QFN-48.
I'd guess they aren't using straight up scratch pads, though, but rather the TMTO desynchronization trick from Solar Designer. Regardless, the physical limitations as above should still be the same.