OK, not the best picture, but the angle shows 'em all (the right-hand rear side window has duplicates of all the left-hand rear side window stickers).
Rear door window: barcode sticker for the local toll road.
Back side window, counterclockwise from top-left: AYSO Soccer, Shrockworks, K&N, Jack Ingram (local Nissan dealer who treats me right), Appalachian Trail (Round sticker), SXFC Spring Rally 2005, GSM (Great Smoky Mountains - Oval sticker).
Rear window, pretty obvious. Faded "X" sticker from Nissan, X-Rated sticker, SXFC club sticker, Shrockworks sticker.
Rear hatch: Magnetic AYSO Soccer sticker (my wife keeps slapping it back on the truck every time I try to hide it in the garage...)
Rear quarter panel: 4x4 sticker from O'Reilly's Auto Parts. I wouldn't have put them on except for 4x4 Xterras are pretty rare in the Southeast.