What are you advertising here? Surely DCD are not trying to /sell/ this core? It's a UART - it's not exactly revolutionary. If you have a CPU in your FPGA (soft or hard macro), you will have UARTs available - free (well, included in the price) and well-integrated. If you want something different, OpenCores has got about 20 different UART implementations. And of course anyone who can't knock up their own UART in short order has no business doing FPGA design.