Velvet feature panel decal, $60, The Wall Sticker Company
...this one is for you: decal wallpaper! The Wall Sticker Company have come up with this ingenious idea. In panels of 1 metre long by 63cm wide, it makes a pretty feature panel that can be removed so easily when you tire of it, would rather it on another wall or wished it was 10 centimetres to the left of where it currently is! At the moment it's only available in this pattern above, but hopefully it'll take off and they'll come up with more varieties. Each panel is $60. Check it out here
EDIT: Have just heard from Fiona from The Wall Sticker Company who wanted to let me know this cool wallpaper panel is available in a STACK of colours and also custom design - so if there is a particular design you want, they can do it for you. How very awesome!