Bit of a scanner error. Its a Multifunction Epson Stylus RX530 running on the epkowa driver. Prints fine, scans only under sudo. As you can see, all required files have 666 permissions.
Sane needs to start using /sys IMHO as /proc is outdated right?
$ scanimage -L
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
$ groups haste
haste : haste adm dialout fax cdrom floppy tape audio dip video plugdev lpadmin scanner admin saned
$ sudo scanimage -L
$ ls -l /dev/usblp0
crw-rw-rw- 1 root lp 180, 0 2006-06-17 16:20 /dev/usblp0
$ ls -l /proc/bus/
-rw-rw-rw- 1 root root 96 2006-06-17 16:19 /proc/bus/