There's a another site with a lot of photos of the resutls of bike accidents -
www.ride2die.com (the site is very, very graphic, and may not be work-safe for some places - so you can copy and paste the link if you want to see it)
I had a look and spent some time afterwards thining about protective gear and my attitude to risk. I'm still in two minds about the value of the site. It is worth being periodically reminded that riding a bike is inherently more dangerous than driving a car. What would be a minor accident in a car can be a major accident on a bike. We do become complacent after a while, and need a shock to remind us to be careful.
On the other hand, the site is so graphic that I: a) question its intent; and b) would not want to be distracted by the images when I should be concentrating on minimising the risk on the road.
As a result, I would be more inclined to wear full leathers on a country run (where a crash is likely to be high speed), and perhaps Icon style body armour for some city runs. I can't see myself strapping body armour for the 15 minute run to work, but that is perhaps when I might need it.
High speeds on public roads is another issue. I'm frequently guilty of it, and it raises the risk to myself and other road users - no matter how much I try to do it 'safely'.