Screw you naysayers ;-)
I'm in for one. Now. Now just to figure out who gets my old one... (this will be the 7th Nook purchase for my immediate family I think...).
Nook Simple Touch is already my most favorite device ever - and this little addition will be even more perfect. I go through batteries like no tomorrow on the clip-on light... not to mention the fact that it sometimes gets turned on automatically and drains batteries faster.
This is a great addition...