We did the 10p/week thing too, until the older ones reached teenage years and started going out on their own. They mostly saved it until they were seven or eight-ish. If they badly wanted to buy something we would match what they managed to save themselves. We've never really linked pocket money to behaviour - too disorganised to remember who-did-what-to-whom each week - or to having to earn it. I prefer to emphasise a 'we're all in this together' approach to household chores.
Since last year, when our dd1 was 15, we've given her 65gbp a month. It sounds an awful lot (and certainly more than dh and I have for ourselves!) but we looked at it as though she was spending her own Child Benefit rather than me spend it for her and give her pocket money. She has to buy everything with it, apart from school uniform, including birthday and Xmas presents for family and friends, school lunches, clothes and shoes and all outings. (We have no public transport locally, so going to the nearest town with a cinema costs 7.70gbp in taxi and then the bus, unless one of us is around to drive her, which costs a gallon of petrol, too!)
I have to say, I did gulp when we made out the bank transfer but it has worked really well. It has stopped the arguments over extra money for this, that, or the other and IIRC, she hasn't once asked for any additional money since we started. She is extremely thrifty and has a great eye for worthwhile bargains - if you want to buy all your Xmas pressies for 20 quid, she's your girl. Also, designer labels somehow don't appeal any more when you have to buy things youself!! All in all, I reckon we have saved money by doing this.
We did something similar for our boys, which also worked okay, although they weren't as good as dd1 at budgeting. Because we've got big age gaps we've never been in the position of having to give 65gbp x 2 or 3 but I can see that if you have a couple of teenagers close together, it wouldn't be so easy to do.
All of ours had p/t jobs at various stages and to be honest, I think that's when they realised the value of money. When they understand they've had to wash dishes for four hours to buy a desired CD it concentrates the mind greatly!