The NYT has an article on the top 5 foods worth purchasing organic versions of, you know if you had to choose. It is pretty crazy to think that many people get a significant portion of thier veggie intake from Katchup, but it put the condiment at #4 on the NYT list.
4. Ketchup: For some families, ketchup accounts for a large part of the household vegetable intake. About 75 percent of tomato consumption is in the form of processed tomatoes, including juice, tomato paste and ketchup. Notably, recent research has shown organic ketchup has about double the antioxidants of conventional ketchup.
Full article here: http://well.blogs.nytimes.com/2007/10/22/five-easy-ways-to-go-organic/