I recently saw that Lattice Semiconductor is having a promotion for a
development kit that has PCIe x1, dual gigabit ethernet and 1Gb DDR3
for $99:
http://www.latticesemi.com/products/developmenthardware/developmentkits/ecp3versadevelopmentkit.cfm
This might be interesting for people who are looking for an
intermediary with low-latency between a USRP N-device (or two of
them?).
Just raising awareness on, what I think, is a pretty decent deal.
Brian