The study drugs will be given to you on an outpatient basis and will involve a minimum of 4 cycles and up to a maximum of 12 cycles of chemotherapy. All chemotherapy will be given through a catheter placed in a vein in the shoulder in "cycles". Each "cycle" equals 14 days. On the first day (Day 1) of each cycle, bevacizumab will be given for 30 to 90 minutes and oxaliplatin and leucovorin for 2 hours. On Day 1 as well, part of the total 5-FU dose will be given for 15 minutes through the catheter. The rest of the 5-FU dose is then given through a pump over the next 46 hours. After 46 hours, you will have a rest period, without drug treatment for the rest of the cycle until the start of the next cycle.