Hey callmemister, here is how I got USB permissions working properly in Ubuntu 10.10 (Maverick) (for use with AlienFXLite):
(Keep in mind there are several ways to get this done, this is just one method!)
First, go to System - Administration - Users and Groups. Click on the "Manage Groups" button.
If you don't have one already, create a group called "usbusers". After you create it, highlight it and click on Properties. Put a checkmark next to your name (and anyone else who needs full permissions to USB devices).
Then open up a terminal (Applications - Accessories - Terminal).
In the terminal, type:
This should open up an empty file in a text editor called "gedit".
sudo gedit /etc/udev/rules.d/47-usb.rules
(note that the name of the file is not important, you can call it whatever you want, but since the rules in this folder are executed in order, I think it is best to name it starting with a number in the 40-49 range)
In that file, write the following:
Save and close the file. This file should allow full access (mode=0666) to anyone in the "usbusers" group for USB devices. Also, the "# User Edit" is a comment (denoted by the # at the start of the line). I like to leave comments in any file I edit just so I know I have been there before in case I come back to do more editing.
# User Edit
SUBSYSTEM=="usb", MODE="0666", GROUP="usbusers"
This next part I tried when stuff wasn't working so I'm not sure if it is necessary or not... back in the terminal, type:
(this makes the file you just created executable)
sudo chmod a+rx /etc/udev/rules.d/47-usb.rules
Reboot and cross your fingers!