http://reactivated.net/writing_udev_rules.html
Also:<br>
http://n2.nabble.com/Automatically-grant-user-permission-to-use-USB-scanner-in-F11-x86-64-td3374924.html
<br>
I'm not sure if that's just Fedora 11, or if it applies to 10 as well. I'll keep looking.