Not much progress on the Beagle Board project today, since the kernel on my host machine would not boot after 'just following the tutorial'.
I am writing this as I am waiting for a loooong Ubuntu live CD download, which I hope will put me in a position to undo the kernel setting changes I have done while trying to establish an Open Embedded build environment on my Linux host machine. I made those changes (in /etc/sysctl.conf) following this tutorial, so if you're thinking about doing the same thing, you might - as opposed to me - make sure you understand what this does first. Otherwise you might end up with a non-booting kernel like myself. I can't say that the setup of the Open Embedded build chain looks like a straightforward thing to do, but let's see how things go tomorrow.
And while waiting, I actually stumbled across another surprise: Koen's Angstrom demo image actually does include the ipkg package management system; the GPE-Package GUI tool can be accessed through the Enlightenment menu (Applications -> Accessoires -> Packacke Manager), and in retrospect, I can't understand why I hadn't found the /etc/ipkg directory already yesterday. That directory by the way is a symlink to /etc/opkg, which makes me wonder whether Open Embedded actually uses the opkg fork of the ipkg project. I thought opkg was exclusive to OpenMoko?