jett got the hiccups all the time when he was in me.. they would last anywhere from about 4/5mins to 10 mins at a time and by then he isnt a very happy chappy. He still gets them neary every day too. after about 5mins he starts to get a bit annoyed and upset but, i havent been able to stop them., even putting a bottle in his mouth doesnt seem to work. i just try and let them finish themself. One of my friends told me that apparently if babies get hiccups it means that their stomach is getting stronger.... maybe and old wives tale.... not sure...
good luck anyway. sorry it wasnt much help.