If anyone is in the market for a good trunk organizer for your FR-S/BRZ the Rola 59000 M.O.V.E. Rigid-Base Interior Organizer has been working out nicely for me.
http://www.rolaproducts.com/content/...035&part=59000
I got mine from eBay for $51 shipped it;s a bit pricey but it's a very well made product, fits just right in our small trunk and doesn't slide around.