I spent most of the day working on the gumstix computer I have. I am pretty good at the "real" embedded stuff (no display), but the screen stuff is all black magic. So I have learned a lot about this so far. The gumstix computers consist of a processor board with connectors on the front and back. So you can attach up to two other boards. Given you have peripherals requiring drivers spread across three boards, figuring out how to build a kernel and what modules are needed across three boards can drive you crazy.
Most of this is handled with kernel modules, but we think the wifi system uses different GPIO lines depending on which daughter board you have.
We have the display basically working and are trying to figure out what driver we need for the touchscreen. The wifi module loaded, but I left the antennas at home. Fortunately, Koen has a Neo he has taken apart and we took the GPS antenna from that. The GPS antenna marginally improved reception so I tacked a wire on the patch antenna board, so basically we use the GPS antenna for the connector and cable. Now we can see many access points. Still can not connect to the one we are using, but this will likely be easy after some sleep.
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