Laptop Lunches sells great bento/boxes. I love them because it's so easy to make sure the meal is well rounded with the compartments, and they come with lids so I can pack yoghurt, hummus, etc. A bit pricy but I expect it to last for many many years!
I brought a few home from Japan years ago... But I've been greedy for more. We have a couple of Japanese "dollar" stores here. (most things are $2, but you get the picture.) We've come home with some great stuff! We're finally putting it to use now that DD is just going to day camps rather than to preschool (where all the food is supplied.) It's been fun!
Re: Lunchbox/bento ideas
Not sure if you've seen this already. This gal is on the Nest/Bump and she has a blog about bento lunches. It's pretty cute.
Bento Madness