An enormous amount of cargo travels by boat, and historically, sea transport has been the largest carrier of freight. However, traveling over water isn't a very speedy mode of transportation (typically <20 mph), but there are some possible ways to go faster (though they don't come cheap). Here are just a few examples of sea-going ships that would definitely beat a slow boat to China.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post