When I was doing some initial testing with the WIZ5100 chip, I found that I could do 6 universes of E1.31 by running the chip in raw mode and letting the cpu handle the packet inspection. But instead I decided to go with one universe per hardware socket. This limited me to 4 universes, but since the packet inspection is all done in hardware rather than having to be handled by the CPU, the presence of large numbers of packets on the LAN doesn't cause a problem. The WIZ5200 should be good for 8 universes. Everything is a tradeoff.