Dear Sir
We , as a development team of students, have developed a complete reference design using Cypress SX2 High Speed USB device.
The design uses a Spartan-3 FPGA connected to SX2 in order to control the device and send/receive data
We have published the complete work, along with documentation, source codes and every thing needed to do the task to Circuit Cellar magazine. We hope that they publish the paper soon, after that you can see, how easily you can reach rates above 400MBits/s using USB 2.0 SX2 controller