Bento can be elaborately arranged in a style called "kyaraben" ("character bento"). Kyaraben are typically decorated to look like popular characters from Japanese cartoons (anime), comic books (manga), or video games. Another popular bento style is "oekakiben" or "picture bento". This is decorated to look like people, animals, buildings and monuments, or items such as flowers and plants. Contests are often held where bento arrangers compete for the most aesthetically pleasing arrangements.
Wiki link: http://en.wikipedia.org/wiki/Bento
A friend of mine, Nadya Collins Josephy, imports and sells Bento products and makes up take away bento boxes to buy from her home in Wynberg.
Here is her PINTEREST board showing her and other's designs: http://pinterest.com/jetstorm/bento-love/
You can find her page on FACEBOOK with all her contact info here: https://www.facebook.com/pages/The-Bento-Box/265426636814727?sk=info