There's a book called Baby-led Weaning that explains it all.
The short of it: you don't use spoons or purees. You let the baby tell you when they are ready to wean, usually at about 6 months. You keep demand feeding milk while you start weaning. You offer bits of the family meal to them with only small restrictions (such as low salt, no honey, no whole nuts). You let them work out how to handle and eat it. You don't feed them. They learn to pick up the food, get it to their mouth, chew and swallow, all by watching you eat and learning in their own time.
They don't eat much at first, but aren't meant to. It is about exploring different tastes, textures, and smells at their own pace. They learn to participate in family meals and be a part of the meal (as opposed to eating different things separately). They also tend to be less picky eaters and willing to try more things because they aren't made to eat anything - they get to pick and choose.
That doesn't mean they will eat only junk. We've just started with it and so far my LO has eaten steamed veggies (carrots, broccoli, cauliflower, sweet potatoes), cucumbers, banana, and sweet pickles.
There is a support thread in the sticky section of the weaning forum. It is a more relaxed and less time intensive way of weaning, too. No messing around with making and storying purees. Nice!