Are there USB DVD-rom drives that are not compatible with the SheevaPlug?
If you want to write you'll need more than a DVD-ROM. I'd expect any DVD writer to work. I've just plugged in my ancient IOMEGA DVDRW4224INQ-D which I have in a USB enclosure and it shows up as:
root@plug:~# cat /proc/sys/dev/cdrom/info
CD-ROM information, Id: cdrom.c 3.20 2003/12/17
drive name: sr0
drive speed: 32
drive # of slots: 1
Can close tray: 1
Can open tray: 1
Can lock tray: 1
Can change speed: 1
Can select disk: 0
Can read multisession: 1
Can read MCN: 1
Reports media changed: 1
Can play audio: 1
Can write CD-R: 1
Can write CD-RW: 1
Can read DVD: 1
Can write DVD-R: 1
Can write DVD-RAM: 1
Can read MRW: 1
Can write MRW: 1
Can write RAM: 1
which is what I'd expect
Is there a command-line method or script to easily create and burn DVD images from a given directory?
genisoimage should be able to do things.