on a second thought.. why didn't he just rip out a couple of 5v rails from the PSU? it would be cheaper (like free) and quicker. Oh well, these japanese guys are cool for a reason ;)
No mather how many ports you have, the max is always 256 But thats a definitely stupid use of 30 USBs ... It would be far easier to just get a PSU with 2 seperated 24A sources and attach it to one of those ^^