The Xen bug is still open but a nice person on the Ubuntu Forums suggested
using aptitude to install the packages. Aptitude was smart enough to
downgrade libc6 in order to get around the dependency problem.
So I am now about half way through step 8 (Create new default Xen image)
of [my plan](http://blog.darkmere.gen.nz/archives/2007/11/13/). I’d hope
I can get a draft tidy Xen image sorted out in the next couple of days