For those who don't monitor the avr32linux kernel mailing list it is worth mentioning that as of Linux kernel version 2.6.22 the way you drive the LEDs on the NGW has changed.
The configfs interface that so many have been grappling with across so many different threads and wiki pages is no longer available by default, though it can be compiled in with an edit of the kernel config, board code and a kernel recompile.
Instead the LEDs are hooked in to the kernel LED framework. This framework means that you now use /sys/class/leds to access them and you can hook them up to a number of triggers. As a demonstration you can hook an LED to a heartbeat trigger and watch it flash away nicely :)
Full details in this thread of the mailing list archives: http://avr32linux.org/archives/k...
This change does mean that the BSP2.0 startup scripts will fail on the GPIO init which can look scary but don't worry, it's nothing fatal unless you are using the gpio interface for things other than LEDs ^^
Post here if you have any further questions and if you see wiki docco anywhere, please update it (I'll be doing the same on any I come across :) )