/proc/bus/usb has permissions 664 and gid of 'usb' for all items.
udev should provide the same for /dev/bus/usb, so users in the 'usb' group can
access usb devices from userland (eg sane, gphoto).

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

Index: files/udev.rules-098
===================================================================
RCS file: /var/cvsroot/gentoo-x86/sys-fs/udev/files/udev.rules-098,v
retrieving revision 1.1
diff -u -3 -p -w -b -B -r1.1 udev.rules-098
--- files/udev.rules-098	31 Aug 2006 04:58:44 -0000	1.1
+++ files/udev.rules-098	13 Nov 2006 10:10:36 -0000
@@ -244,7 +244,7 @@ KERNEL=="issm*",	NAME="infiniband/%k"
 
 
 # usbfs-like device nodes
-SUBSYSTEM=="usb_device", PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", NAME="%c", MODE="0644"
+SUBSYSTEM=="usb_device", PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", NAME="%c", MODE="0664", GROUP="usb"
 
 
 # Module autoloading