NOTE:
Jan 2013: Tutorials are outdated, they were written in 2009 or 2010 when you couldn't use custom ringtones and shit.

Tutorials:

• How To Make Your Own Ringtone and SMS tone
• How To Access Your iPhone's File System
• Basic Instructions

Sample Ringtones:

• Haunted by Taylor Swift
• Kua Shi Dai by Jay Chou
• I Shall Call Him Squishy by Dory from Finding Nemo
• Like A Dog Chasing Cars (2:12 - 3:37) from The Dark Knight OST
• Tron Legacy Encom Part II by Daft Punk
• Wieniawski Caprice No.4 Op.18 by Nathan Milstein
• "Do not eat your tampons, you sick bitch" by Michael Buckley
• "You sick bitch" by Michael Buckley

Sample SMS Tones:

• Achievement Unlocked (Xbox)
• Headshot (Counter Strike)
• Uh-Oh (ICQ's new message alert)
• Incoming Text (Text to Speech)
• Kimmunicator alert (Kim Possible)
• Riko's tada (Penguins of Madagascar)
• Snapping fingers sound effect
• Communicator alert (Star Trek)
• 1-Up (Super Mario Bros)
• "Do not eat your tampons, you sick bitch" (Michael Buckley)
• "You sick bitch" (Michael Buckley)