My son is nearly 4 months now, and hasn't had a dummy. We tried it a couple of times in the early days, he wasn't interested, and my take on it was why try to give him something that I'll just need to take away at some point.
He's started sucking on his thumb/fingers and that seems to soothe (and entertain!) him. I hadn't looked back re not giving him a dummy. However my mother-in-law keeps banging on about why are we not giving him a dummy, as if this is neglectful? and someone else has commented that at least you can take a dummy away whereas if he starts sucking his thumb for comfort he may end up doing that forever!!!
Now I don't know what to do for the best... any ideas?!!