NetFPGA is a FPGA based line-rate, flexible, and open platform for research, and classroom experimentation. I found the address of this page because one of the blog comments had link to this web site. Looks interesting.
The NetFPGA platform promises that it enables researchers and instructors to build working prototypes of high-speed, hardware-accelerated networking systems. The platform can be used in the classroom to teach students how to build Ethernet switches and Internet Protocol (IP) routers using hardware rather than software. The platform can be used by researchers to prototype advanced services for next-generation networks.