I have a bamboo cutting board that I've been using for about 10 years and it's still as good as new. Perhaps it was treated specially, because I've never done anything special to care for it (and had no idea that might be necessary).

I also have some bamboo spoons and spatulas that get used almost daily and they have lasted for many years as well. I wash them in the dishwasher, which perhaps gives them the level of moisture needed to stay good.