Dh's brother was born with club feet - from what I know he was in plaster casts for the first 2 (I think?) years, after he had surgery because he has quite long scars on his legs. This was 30 years ago though so I imagine they've upgraded what they can do now. In terms of future development he had to 'relearn' how to walk when his casts came off but he has been a top level sportsman in football and cricket and is currently training for a half marathon. In fact they think it might have actually helped with the football because he was able to kick it in a way that no one else could!
BTW I met him when he was about 18 or 19 and would never have known about all this - he's no different to anyone else.
Hope this helps a bit :) PM if you want to know anything else and I can ask DH for you