You could paint it? Get funky with it? Or just go for the rustic look just like this one.
Best of all, you can pickup most pallets for free behind local hardware shops and at building sites.
So, just pack it full of compost, potting mix and a bit of organic fertilizer such as Worm castings, as they don't smell and believe me, you just may become the talk of the town. Well, the street that is!