I'm not sure what sort of project you're interested in, but we're currently building open source network taps using PHY ICs and an FPGA. As part of the project

I'm not sure what sort of project you're interested in, but we're currently building open source network taps using PHY ICs and an FPGA. As part of the project a USB 3.0 core is being developed to move captured data to a host system. https://github.com/mossmann/daisho https://github.com/mossmann/daisho