Ds is 2.9. Dh thinks it's time that he was learning to use the potty. We have one, he sits on it (clothed, won't go near it with a bare bum ), but will never say if he needs a wee or even if he has done one. He can be standing there weeing (in the bath for eg) and looks down in total surprise - he just doesn't seem to get it!
I would LOVE to get him out of nappies, not least because having two children in washable nappies is hard work, and because my back is killing me from all the kneeling down to change them etc .
I'm guessing most people will say "wait until he is ready" - but we tried that with dd2 and ended up forcing the issue when she was about 3.5 because she showed no signs that she was ready to learn either (a long time ago, can't remember how we did it then! I do remember though taking her away on a school trip at about 4 and her going through every bit of clothing we took in the first two days of a week-long trip )