I've just posted a utility "rfsbuild" which is intended to ease the task of creating Root File Systems for embedded ARM systems. It can run on an X86 host and use QEMU to generate the RFS or it can run natively on an ARM host. It uses an idea I first saw in David Zeuthen's livecd-creator program and which I call a "Keystone Package" to simplify the process. A Keystone Package is an RPM which encapsulates a set of requirements for a particular RFS. So, you could have a Keystone Package for your router and another Keystone Package for your NAS device and another for your music server. Each would specify the specific set of packages and modifications required for each of those unique devices.

Full details and downloads are available here:

http://fedoraproject.org/wiki/Architectures/ARM/RfsBuild

This is a beta release. If you find it useful please post suggestions, fixes, comments etc. on this list.

Thanks, Tony