my friend works at an apple store and she says its normally around 250+ to get a screen fixed, she highly suggested to my friend, who just happened to shatter hers on her birthday, to just buy a new phone.
unless you don't wanna get stuck in another 2 year contract, i'd buy a new one as well, kinda pointless to spend 250 or more on just a screen when 200 can get you a brand new one altogether.
hope that helped.
Since I am a brand new Att customer with the new 3G, I will not be able to get the discounted rate and would have to pay $599 for a replacement. Still better to have the cracked unit repaired for $250. Live and learn and buy a case!