With the new expansions available to the 600, would it be possible too add USB port and usable Internet connectivity? If those were possible, and I think they are, they would set the 600 above straight hardware emulation such as the FPGA Replay and FPGA MiST.
With a clockport you can add a RapidRoad for great USB usability. Many already have. And with the PCMCIA port you have all kinds of options for adding a network card, so I think you're already covered on both fronts.
