My son is 26 months and we have not done any active potty train yet. He occassionally asks to sit on it, but that's as far as we've gone. I intend to put concentrated effort into this at around 2 1/2. In general boys are older to potty train and I most commonly read of it happening in the 2 1/2 - 3 year range.
In my
PR (Jan 08), there is only 1 or 2 fully potty trained girls, there are a few (maybe a half dozen or so) who are actively training now and most are girls.
My opinion on this is to follow the lead of your toddler, they should be able to tell you when they have to go, or start by telling you they've just gone, ask for the potty, be able to stay dry for longer periods of time between diapers, etc... I would think you're a ways off yet at not yet 1.
The potty training board on JM has some good advice too.