Form an SGI Origin 2000 to Netapp F740, over 100Mbps Ethernet, I get 10MBytes/s consistent data transfer rate over nfs. However this is no good benchmark as the bottleneck here is ethernet speed and not filer. However if you can connect 3-4 NIC and get same performance an all four interfaces at the same time, this might suggest a very good performance. ---
On a Sun U250, 2x300mhz, I can get about 80-90Mbits/sec if nothing is going on with the sun box.
Multiple mounts, with multiple tests (into a switched, etherchannel environment to the F760) results in slower performance from the Sun.
My next round of news servers in our cluster will be on non-PCI based hardware.