for trying to get a head start with embedded CPUs and Gigabit Ethernet, the Spartan-3A DSP Starter Platform seems a good deal. I tried hard, but didn't find the specification of the JX1 and JX2 expansion connector specification.
Has anybody the part number of the connectors and the mating parts at hand?
Spartan-3A DSP Starter Platform User Guide, UG454 (v1.0) October 3,
2007. page 21:
EXP Interfaces The EXP specification defines a 132-pin connector, with 24 power I/Os,
24 grounds I/Os, and 84 user I/Os. The standard EXP configuration implemented on the Spartan-3A DSP Starter Platform uses two connectors (Samtec part number QTE-060-09-F-D-A) in a dual slot EXP configuration, for a total of 168 user I/Os.
Digikey has stock on board heights 5, 8, 11, and 16 mm.
The mating connector is the QSE-060-01-L-D-A where Digikey also has stock.
I don't find the "SO" series of standoffs in Digikey's parts off hand.