The ultimate NIC
- gigabit Ethernet
- PCIe x1 host interface
- IPv[46] IP, TCP, UDP, (maybe ICMP) checksuming
- TCP segment offload (TOE)
- various IPsec AH and ESP engines
- GPL licensed Linux driver
- BSD licensed *BSD, Solaris driver
closest thing in existance
The PCIe Intel Pro/1000 is rather similar.