My impression is that at least one of the devs has a Zaurus already.
Also, you should be able to add the Mer repos (assuming they're Z-compatible, which I don't know one way or the other) and install stuff over ZUbuntu already. Anybody feeling particularly adventurous can add this line to /etc/apt/sources.list:
deb http://download.opensuse.org/repositories/Maemo://Mer://Stable/Ubuntu_9.04/ /
You probably also need these in /etc/apt/preferences:
Package: *
Pin: release a=jaunty
Pin-Priority: 800
Package: *
Pin: origin download.opensuse.org
Pin-Priority: 801
Just remember, I haven't tested this myself, and can't/don't support it. It may or may not work, and you possibly will FUBAR your install. Anyway, have fun.