Patients receive oxaliplatin IV over 2 hours, leucovorin calcium IV, and fluorouracil IV on days 1 and 15. Patients also receive oral capecitabine every 8 hours on days 1-2 and 15-16. Leucovorin calcium and fluorouracil administration is held at dose level 4 and above. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.