first off I have to say I love the raspbian image. It's much more responsive than the armel builds, especially when run from USB HDD ;D
But I'm missing the root console on the serial interface. The normal debian squeeze and wheezy images for Raspberry Pi give you a root shell on the serial console.
As far as I understood so far, it looks like the init script is inside the kernel.img so I haven't tampered with that yet.
Is is possible to add /bin/sh as last command to the init script to get a root shell on serial console?