i put one small one on the back of my phone and one on the back of my macbook & one on my car bumper. (ill add that pic later)
i got the stickers from here--- Android Fan Store. Get your stickers, decals and more... - Free shipping on all US orders
the stickers stick great on my car bumper and macbook and hard drive case, but it seems to want to lift up on the back of the nexus one. for me to handle this issue i just ordered this clear rubberized case.
here is where the clear rubber case is--- CLEAR Soft Rubber Skin Case Google Nexus One Accessory - eBay (item 250574239559 end time Feb-09-10 21:10:52 PST)