Template:FAQ/Questions/displays is recommended for

Which display(s) is recommended for the gumstix?
Holly Gates of eInk spent some time getting the sony 6.92cm color TFT set up on a gumstix. Check out this Display page.

Can PCB board with a Hirose connector be designed that will connect into the etherstix pack stack?
In order to create

- a high-speed parallel bus connection to a gumstix board (to an FPGA which can be programmed to match the bus specs)?

- What is the max bus speed that could be achieved this way? What is a safe address space not covered by any of the stix?

Yes, and right now using nCS4 address space is being left aside for such a purpose. Bus speed ranges across the entire span that the PXA can use. The default 100 MHz.