Ok, you can do a few things. You can purchase songs from Itunes and create your own ringtones, or jail break your iphone.

There are other ways but a pain for me to figure out. I jail broke my phone and I love it. All the kick ass back grounds and options is great. I've got 5+ Family guy tones, top gun, frank caliendo, Gears of war, all sorts of tones.

-Ant.