once you've angstrom working, why not give a try to debian zaurus ?
Because Angstrom is more or less Debian (with patches applied to make it more suitable for Zaurus and much better package granularity)
To use Debian armel you need Angstrom kernel, xserver, ts driver, zaurusd, keymap, tweaks already in Angstrom, etc.
Your work on bringing debian to zaurus is much appreciated, but please consider contributing some of your findings to Angstrom.
(Disclaimer: no affiliation at all with OE/Angstrom - also I don't want to start a flame war, just my humble opinion)