Take PR 1.3 kernel, 

mkimage -A arm -O linux -T kernel -C none -a 80008000 -e 80008000 -n maemopr1.3 -d zImage uImage

run builder.py in same dir as u-boot.bin

U-boot sources can be found at http://al.robotfuzz.com/~al/maemo/u-boot/

CONFIG for ONENAND is disabled, in addition to those sources.

Kernel is straight from PR1.3 kernel package.

Credit goes to ali1234 for all the hard work getting this to work.