Are you going to release Xylon for people to play?

The video captures the entire game. Still want a copy? ;)

I'd also be interested in open-source projects in either VHDL/Verilog, the best i've seen is opencores but it seems to have died a little.

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