do you know if they just change the glass or if they actually give you a new phone if the glass is cracked? I have an unlocked and jailbroken phone and am concerned about dropping it and the glass cracking. I would not want them to charge me 250 and then give me a phone with a firmware I can't unlock.
The problem with a broken glass is that Apple will not cover it under warranty because it is physical damage. Get your tech savvy friend to fix it or try it yourself there are repair guides online that basically explain the whole process. The 3G is easier to fix than the iPod touch.
We replace the digitizer (the glass part) for $75, and that includes your return shipping. We replace the LCD for the same price. If you need both, then its $100 even, and that includes the return shipping.
If its an ipod touch, its $65 for the digitizer repair (includes return shipping) and the same price for the LCD, or if you need both, its a total of $90, which includes return shipping.