OK, sure, you can purchase a custom ringtone made from your favorite song directly from iTunes. But some of you may not have known that you can create ringtones out of your tracks right in iTunes. While Apple has its own FAQ on the iPhone and within its confines is a section about ringtones, and a readily available knowledge base article about how to create ringtones in iTunes. You may not be aware of the fact that Apple also published articles about how to create ringtones in Garageband.
Happy ringing.