Nah mine's not cracked. There are loads of good free apps from the iTunes store, of course there are some better/different ones for the cracked phone, but I don't need or want them.
I don't know if you can access the app store on a cracked phone, but it really is stunningly simple to use, very well thought out.
You don't have to buy music from iTunes to put it on, it can be any music you've got. The only thing I don't like is synchronisation - I much prefer drag and drop for music etc, but that's a smallish disadvantage.