I posed the same question on the scratchbox-users mailing list and sb2 developer Lauri had a few useful answers for me:

http://lists.scratchbox.org/pipermai...il/001768.html

Scratchbox2 is not supposed to remap the /dev directory, but instead commands like mknod. The latest developer edition fixes this partially: http://lists.scratchbox.org/pipermai...il/001776.html

Looks like this is worked on

By the way. Where can I find the source code of the "easy-debian scripts". And what do they have to do with debootstrap and scratchbox2?