@Markus - The mucous build up of an ex-smoker is just your body's way of cleansing itself. Your lungs are clearing themselves out and as the mucous travels down the esophagus it also carries with it a lot of bacteria and stuff that are probably what are irritating your throat every day.
Hang in there though, it won't last long. You've done a great thing by quitting smoking, not only for yourself but for those who love you too.
Also don't forget to drink lots of water and eat plenty of fruits and vegetables so you don't become ill from all that excess mucous and bacteria. I'm sure you'll be feeling better than you have in a long time in no time. Good luck.