I did, but not until he was around 6 weeks and started sleeping through the night. I would pump to empty and ended up producing too much milk until he was 9 months, when it regulated. We would have gone longer, but I had wisdom teeth removed when he was 17 months old and the pain meds prevented me from breastfeeding, so we just stopped. He was only BFing twice a day anyway so it wasn't too depressing.
Come to think of it, he stopped BFing on May 4, 2010...Miss Anberlin was born May 4, 2011. Odd...