I wrote a SPI Driver for Collie. It's very slow, because it runs at the lowest clock ATM. You can play with different speed using:
I don't know yet what the numbers mean, but I will soon.
Patches can be found at http://www2.informatik.hu-berlin.de/~tkunze/zaurus/patches .
The important ones are:
-fixes GPIO direction setting
-implements SPI irq setting
-the spi driver
-from LKML with very little changes by me
I will provide a bootstrap-image for testing soon: