Hi Yankey,
I had the dummy dilemma too and searched through the mumsnet archives for advice - the most reasuring messages were all saying ditch the dummy and go cold turkey - the ones who tried attachments etc seemed to be prolonging the problem. Personally, I was always embarrassed taking him out with a dummy in and hate seeing toddlers plugged up when they should be babbling away, so at 6 months old decided to be brave and get rid of it.
I had also started back at work full time and was sick of the multiple night wakings to re-dummify him. So, I did controlled crying and got rid of all the dummies at the same time - we had 2 awful nights, but I stuck to the CC rules of going in at increasing intervals to reassure him, but not staying too long or picking him up. I also bought him a new blankie to replace the dummy that always stayed in the cot.
The third night was loads better, and ever since he has slept all night and if he ever does wake, manages to go back to sleep himself with minimal fuss (unless he's ill).
It really was the best thing I did, and just like the other mumsnetters, I found that he slept more soundly without the dummy than he ever did with it.
Yours is older so it may take a little more than 2 nights, but if you really want to do it and are prepared to put up with a couple of bad nights to ensure better sleep for all of you, it should work.
Why not read the archives on dummies - they may be more convincing than me!
good luck
x